The Importance of Resistor Values and Charging a Phone

We were presented with a device that had an internal battery. The task was to figure out if this device is identical to one that uses an external battery, minus plus and temperature sensor input. To achieve this, we needed to find the correct resistor values.

If we try to use two resistors marked 12 kilo-ohms, we would get about 12 kilo-ohms. However, with these values, the phone should be charging, but you see I didn't press the power button, it didn't start then there is now, well, even if it started now then there is now it, well, even here you can see, in principle, that the indication is that the battery is charging.

We then saw that we have a charger, which means 10 kilo-ohms for the resistor. However, this resistor is marked as 10 kilo-ohms but cannot be used because 10 kilo-ohms cannot be used with internal devices and only external batteries can use 10 kilo-ohms.

We then decided to put exactly ten kilos here on the board in this case we saw that without a temperature sensor the phone does not charge as its own should work. In this case, it just works correctly and doesn't even realize that it's not there.

After conducting this experiment, we can conclude that a device with an internal battery is essentially no different from one that uses an external battery, minus plus and the temperature sensor input.

Moreover, without the controller, which was also absent in our case, the phone does work correctly. We realized that even though it didn't have a specific component like a controller or additional hardware parts, the device still worked as expected.

In conclusion to this experiment, we got something useful from this video and learned how to use technical knowledge to improve things around us with hands.

"WEBVTTKind: captionsLanguage: enGood day everyone, I decided to make aGood day everyone, I decided to make aGood day everyone, I decided to make alogical continuation of the video on the topic of how tological continuation of the video on the topic of how tological continuation of the video on the topic of how toinstall any battery in anyinstall any battery in anyinstall any battery in anyphone, since many,phone, since many,phone, since many,having watched the previous video, probablyhaving watched the previous video, probablyhaving watched the previous video, probablysighed and said all this is of coursesighed and said all this is of coursesighed and said all this is of coursegood, but now there are very few phones with removablegood, but now there are very few phones with removablegood, but now there are very few phones with removablebatteries, andbatteries, andbatteries, andmostly in modern devices evenmostly in modern devices evenmostly in modern devices evennot very expensive ones installed built-innot very expensive ones installed built-innot very expensive ones installed built-inbatterybatterybatteryon this occasion I can say the following theon this occasion I can say the following theon this occasion I can say the following thebuilt-in battery doesbuilt-in battery doesbuilt-in battery doesnot differ significantly from the removable batterynot differ significantly from the removable batterynot differ significantly from the removable batterybuilt-in battery in the same way as abuilt-in battery in the same way as abuilt-in battery in the same way as arule there are 3 or 4 outputs and of these outputsrule there are 3 or 4 outputs and of these outputsrule there are 3 or 4 outputs and of these outputsthree outputs are minus plusthree outputs are minus plusthree outputs are minus plusand the well-known output of theand the well-known output of theand the well-known output of thetemperature sensor is the battery in front of us heretemperature sensor is the battery in front of us heretemperature sensor is the battery in front of us herelies this handsome guylies this handsome guylies this handsome guycalled sunset i 510, whichcalled sunset i 510, whichcalled sunset i 510, whichmany call senseit, but I want to getmany call senseit, but I want to getmany call senseit, but I want to geta little clever here, these are twoa little clever here, these are twoa little clever here, these are twoEnglish words, actually sense id,English words, actually sense id,English words, actually sense id,which mean I will feel it, sowhich mean I will feel it, sowhich mean I will feel it, sothis wonderful device wasthis wonderful device wasthis wonderful device wasonce purchased by me in one largeonce purchased by me in one largeonce purchased by me in one largecomputer store in which there was acomputer store in which there was acomputer store in which there was awonderful appraisal department, nowwonderful appraisal department, nowwonderful appraisal department, nowthey no longer get off, they are not practically inthey no longer get off, they are not practically inthey no longer get off, they are not practically instores, the phone was purchased instores, the phone was purchased instores, the phone was purchased inthis condition,this condition,this condition,I bought it, as you might guess,I bought it, as you might guess,I bought it, as you might guess,to get the battery out of it andto get the battery out of it andto get the battery out of it andsell it because at one time theresell it because at one time theresell it because at one time therewas simply a frenzied demand for these batteries,was simply a frenzied demand for these batteries,was simply a frenzied demand for these batteries,exactly. for this model, the model wasexactly. for this model, the model wasexactly. for this model, the model wasvery popular and it is clear that if youvery popular and it is clear that if youvery popular and it is clear that if youhave exactly the same factoryhave exactly the same factoryhave exactly the same factorybattery or a compatible batterybattery or a compatible batterybattery or a compatible batteryfrom a Chinese prototype of this phone,from a Chinese prototype of this phone,from a Chinese prototype of this phone,which by the way can usually be found, butwhich by the way can usually be found, butwhich by the way can usually be found, butthis is far from very simple becausethis is far from very simple becausethis is far from very simple becausethese manufacturers such as sunsetthese manufacturers such as sunsetthese manufacturers such as sunsethighscreenhighscreenhighscreenfixed and so on, they very carefullyfixed and so on, they very carefullyfixed and so on, they very carefullyhide the name of the Chinese prototypes,hide the name of the Chinese prototypes,hide the name of the Chinese prototypes,copies of which thesecopies of which thesecopies of which thesedevices are, even more correctly, it’s notdevices are, even more correctly, it’s notdevices are, even more correctly, it’s nota copy, just rebranding, that is, it’s thea copy, just rebranding, that is, it’s thea copy, just rebranding, that is, it’s thesame device just with differentsame device just with differentsame device just with differentinscriptions, it all means what theinscriptions, it all means what theinscriptions, it all means what thebuilt-in battery of abuilt-in battery of abuilt-in battery of asmartphone is, usually it’s a lithiumsmartphone is, usually it’s a lithiumsmartphone is, usually it’s a lithiumpolymer battery At the output of this batterypolymer battery At the output of this batterypolymer battery At the output of this batterythere is always either such a cable with athere is always either such a cable with athere is always either such a cable with aminiature connector of, or again theminiature connector of, or again theminiature connector of, or again theusual three outputs.usual three outputs.usual three outputs.I already talked about the fact that whenI already talked about the fact that whenI already talked about the fact that whenthere are a lot of wires, in fact they are simplythere are a lot of wires, in fact they are simplythere are a lot of wires, in fact they are simplyduplicated,duplicated,duplicated,that is, if we try to call twothat is, if we try to call twothat is, if we try to call twoblack wires, we will see that theyblack wires, we will see that theyblack wires, we will see that theyare connected just like two redare connected just like two redare connected just like two redwires are connected, the white wire iswires are connected, the white wire iswires are connected, the white wire isnaturally the output of the temperature sensor, Inaturally the output of the temperature sensor, Inaturally the output of the temperature sensor, Iassume that there will now be 10assume that there will now be 10assume that there will now be 10kilo-ohms, let’s check, to be honest, I haven’tkilo-ohms, let’s check, to be honest, I haven’tkilo-ohms, let’s check, to be honest, I haven’tchecked,checked,checked,but I guessed as I said, 10 kilo-ohmsbut I guessed as I said, 10 kilo-ohmsbut I guessed as I said, 10 kilo-ohmsis the most common rating of theis the most common rating of theis the most common rating of thetemperature sensor, which istemperature sensor, which istemperature sensor, which isused in 90 percent of the batteryused in 90 percent of the batteryused in 90 percent of the batterythat It’s also important to understand that thesethat It’s also important to understand that thesethat It’s also important to understand that thesebatteries, in essence, are nobatteries, in essence, are nobatteries, in essence, are nodifferent from liteon batteries, fordifferent from liteon batteries, fordifferent from liteon batteries, forexample, a liteon can isexample, a liteon can isexample, a liteon can ismetal, and these cans are in softmetal, and these cans are in softmetal, and these cans are in softpackaging, it’s usually apackaging, it’s usually apackaging, it’s usually asilver pouch that contains asilver pouch that contains asilver pouch that contains ajelly-like electrolyte inside.jelly-like electrolyte inside.jelly-like electrolyte inside.Lithium-polymer batteriesLithium-polymer batteriesLithium-polymer batteriesare simple. a slightly newer versionare simple. a slightly newer versionare simple. a slightly newer versionor Teon battery, with the sameor Teon battery, with the sameor Teon battery, with the samephysical dimensions, they have a slightly largerphysical dimensions, they have a slightly largerphysical dimensions, they have a slightly largercapacity due to the fact that the volume of the battery iscapacity due to the fact that the volume of the battery iscapacity due to the fact that the volume of the battery isnot occupied by this metal bag,not occupied by this metal bag,not occupied by this metal bag,that is, the wall of these batteriesthat is, the wall of these batteriesthat is, the wall of these batteriesis much thinner and thusis much thinner and thusis much thinner and thusmore electrolyte is placed inside and themore electrolyte is placed inside and themore electrolyte is placed inside and thecapacity is accordingly Is it worth it anymore tocapacity is accordingly Is it worth it anymore tocapacity is accordingly Is it worth it anymore tofence all this for the sake of this, butfence all this for the sake of this, butfence all this for the sake of this, butnevertheless, these batteries are very oftennevertheless, these batteries are very oftennevertheless, these batteries are very oftenused asused asused asbuilt-in ones, although they are removable batteries andbuilt-in ones, although they are removable batteries andbuilt-in ones, although they are removable batteries andlithium polymer is very often found, butlithium polymer is very often found, butlithium polymer is very often found, butsome devices on sale with flags,some devices on sale with flags,some devices on sale with flags,for example, there were both liteonfor example, there were both liteonfor example, there were both liteonbatteries and lithium polymerbatteries and lithium polymerbatteries and lithium polymerNaturally, they are externally the same with theNaturally, they are externally the same with theNaturally, they are externally the same with thesame contacts, but the jarssame contacts, but the jarssame contacts, but the jarsinstalled inside are different, what does this mean, thisinstalled inside are different, what does this mean, thisinstalled inside are different, what does this mean, thismeans that they are absolutely identical inmeans that they are absolutely identical inmeans that they are absolutely identical intheir electrical properties andtheir electrical properties andtheir electrical properties andthey charge and discharge in exactly thethey charge and discharge in exactly thethey charge and discharge in exactly thesame way and you can use themsame way and you can use themsame way and you can use theminterchangeably, so thisinterchangeably, so thisinterchangeably, so thisdevice, which we will now analyze, can bedevice, which we will now analyze, can bedevice, which we will now analyze, can beinstalled as lithium-ion batteryinstalled as lithium-ion batteryinstalled as lithium-ion batteryand lithium polymer battery, if you haveand lithium polymer battery, if you haveand lithium polymer battery, if you havealready delved a little into the topic of replacingalready delved a little into the topic of replacingalready delved a little into the topic of replacingbuilt-in batteries andbuilt-in batteries andbuilt-in batteries andlistened to me carefully, you will now ask, how arelistened to me carefully, you will now ask, how arelistened to me carefully, you will now ask, how arewe going to change the bank if the originalwe going to change the bank if the originalwe going to change the bank if the originalbattery is no longer here, we need tobattery is no longer here, we need tobattery is no longer here, we need torearrange the controller from the oldrearrange the controller from the oldrearrange the controller from the oldbattery, no, my friends, rearrangebattery, no, my friends, rearrangebattery, no, my friends, rearrangeWe don’t need a controller from the old battery,We don’t need a controller from the old battery,We don’t need a controller from the old battery,as I’ve said many times, it’sas I’ve said many times, it’sas I’ve said many times, it’sessentially not a controller at all,essentially not a controller at all,essentially not a controller at all,just ajust ajust ashort-circuit protection board, that is,short-circuit protection board, that is,short-circuit protection board, that is,this board is installed in exactly the same way, it’sthis board is installed in exactly the same way, it’sthis board is installed in exactly the same way, it’sjust short-just short-just short-circuit protection and a temperature sensor, generallycircuit protection and a temperature sensor, generallycircuit protection and a temperature sensor, generallyspeaking, the battery can be connected to a smartphonespeaking, the battery can be connected to a smartphonespeaking, the battery can be connected to a smartphoneand without this board itand without this board itand without this board itwill work in the same way, it’s just that this board iswill work in the same way, it’s just that this board iswill work in the same way, it’s just that this board ismade for our elmmade for our elmmade for our elmgear, although for example it’s not entirelygear, although for example it’s not entirelygear, although for example it’s not entirelyclear to me what the idea of ​​​​ this board is on theclear to me what the idea of ​​​​this board is on theclear to me what the idea of ​​​​this board is on thebuilt-in batteries, if it’sbuilt-in batteries, if it’sbuilt-in batteries, if it’sstill located here inside, whystill located here inside, whystill located here inside, whynot place this protection on the mainnot place this protection on the mainnot place this protection on the mainboard of the smartphone itself, that is, in the case of aboard of the smartphone itself, that is, in the case of aboard of the smartphone itself, that is, in the case of aremovable battery, it’s clear thatremovable battery, it’s clear thatremovable battery, it’s clear thatthe battery is a separate part, it canthe battery is a separate part, it canthe battery is a separate part, it canshort out in your pocket somewhere,short out in your pocket somewhere,short out in your pocket somewhere,for example, or a short circuit can occurfor example, or a short circuit can occurfor example, or a short circuit can occurin the phone itself, but how about thisin the phone itself, but how about thisin the phone itself, but how about thisbattery board, it seems to survive inbattery board, it seems to survive inbattery board, it seems to survive inthis case, well, I don’t I understand, to be honest, whythis case, well, I don’t I understand, to be honest, whythis case, well, I don’t I understand, to be honest, whythis is needed, but almost allthis is needed, but almost allthis is needed, but almost alllithium polymer batteries that are on sale,lithium polymer batteries that are on sale,lithium polymer batteries that are on sale,which are sold in stores in markets,which are sold in stores in markets,which are sold in stores in markets,and so on, as a separate part of them,and so on, as a separate part of them,and so on, as a separate part of them,almost all of them have this protectivealmost all of them have this protectivealmost all of them have this protectiveboard installed, since we willboard installed, since we willboard installed, since we willconnect the battery, we willconnect the battery, we willconnect the battery, we willsimply open this nowsimply open this nowsimply open this nowsmartphone on its mainsmartphone on its mainsmartphone on its mainmotherboard, let's find the battery connection pointsmotherboard, let's find the battery connection pointsmotherboard, let's find the battery connection pointsand just solderand just solderand just solderthe battery there, that's all we can do now,the battery there, that's all we can do now,the battery there, that's all we can do now,well, I'll say right away, I've already prepared a little here,well, I'll say right away, I've already prepared a little here,well, I'll say right away, I've already prepared a little here,but essentially it doesn't change thebut essentially it doesn't change thebut essentially it doesn't change theconnector for connecting the battery,connector for connecting the battery,connector for connecting the battery,we have it here, but in principlewe have it here, but in principlewe have it here, but in principlewe can solder right here butwe can solder right here butwe can solder right here butsolder here firstly it’s inconvenient and secondlysolder here firstly it’s inconvenient and secondlysolder here firstly it’s inconvenient and secondlyit’s incorrect to spoil such a beautifulit’s incorrect to spoil such a beautifulit’s incorrect to spoil such a beautifulconnector we’ll now find the connection points,connector we’ll now find the connection points,connector we’ll now find the connection points,just on the board the process ofjust on the board the process ofjust on the board the process ofconnecting the built-in battery isconnecting the built-in battery isconnecting the built-in battery ispractically no different from what Ipractically no different from what Ipractically no different from what Ishowed in the video with removableshowed in the video with removableshowed in the video with removablebatteries first of all webatteries first of all webatteries first of all wehave to find the minus in order to find thehave to find the minus in order to find thehave to find the minus in order to find theminus, we call the connector withminus, we call the connector withminus, we call the connector withmetal parts, for example, withmetal parts, for example, withmetal parts, for example, withthe screen, let's see if it is connected orthe screen, let's see if it is connected orthe screen, let's see if it is connected orthese metal parts are notthese metal parts are notthese metal parts are notconnected to each other, please noteconnected to each other, please noteconnected to each other, please notethat not all metal parts on the boardthat not all metal parts on the boardthat not all metal parts on the boardcan be connected to the minus, but ifcan be connected to the minus, but ifcan be connected to the minus, but ifyou find several parts that areyou find several parts that areyou find several parts that areconnected with each other, there is a very highconnected with each other, there is a very highconnected with each other, there is a very highprobability that this is a minus, this screen,probability that this is a minus, this screen,probability that this is a minus, this screen,in principle, rings with a minus,in principle, rings with a minus,in principle, rings with a minus,let's see,let's see,let's see,but the minus of the lower one is its own and there is nobut the minus of the lower one is its own and there is nobut the minus of the lower one is its own and there is noneed to look for the minus here on the connector, weneed to look for the minus here on the connector, weneed to look for the minus here on the connector, weneed to find it on the board, but in thisneed to find it on the board, but in thisneed to find it on the board, but in thiscase it is convenient to solder it here,case it is convenient to solder it here,case it is convenient to solder it here,you can do this unscrew the screwyou can do this unscrew the screwyou can do this unscrew the screwlike this, you see after youlike this, you see after youlike this, you see after yousolder the wiring here and you cansolder the wiring here and you cansolder the wiring here and you canscrew it back in to find the plus, as ascrew it back in to find the plus, as ascrew it back in to find the plus, as arule, you need to find the largestrule, you need to find the largestrule, you need to find the largestcapacitor for platinum, I honestlycapacitor for platinum, I honestlycapacitor for platinum, I honestlyassume that the plus and minus are from and extremeassume that the plus and minus are from and extremeassume that the plus and minus are from and extremecontact, well, let's look to findcontact, well, let's look to findcontact, well, let's look to findthe plus and minus we are looking for 2 contactsthe plus and minus we are looking for 2 contactsthe plus and minus we are looking for 2 contactson this connector that will brieflyon this connector that will brieflyon this connector that will brieflyring when the polarity is changed, asring when the polarity is changed, asring when the polarity is changed, asI showed in the previous video, well, there I willI showed in the previous video, well, there I willI showed in the previous video, well, there I willshow you in more detail, you canshow you in more detail, you canshow you in more detail, you canseeseeseehere you can hear a short guide, here I change thehere you can hear a short guide, here I change thehere you can hear a short guide, here I change thepolarity of the probes and when changing the polaritypolarity of the probes and when changing the polaritypolarity of the probes and when changing the polaritywe hear a short beep, this happenswe hear a short beep, this happenswe hear a short beep, this happensbecause an electrolytic capacitorbecause an electrolytic capacitorbecause an electrolytic capacitorthat is located somewhere on this boardthat is located somewhere on this boardthat is located somewhere on this boardis charged and discharged when weis charged and discharged when weis charged and discharged when weconnect a multimeter to them in theconnect a multimeter to them in theconnect a multimeter to them in theopposite polarity, that is, asopposite polarity, that is, asopposite polarity, that is, asif twoif twoif twovoltages of opposite polarityvoltages of opposite polarityvoltages of opposite polaritycollide and the capacitorcollide and the capacitorcollide and the capacitoris recharged, but we can nowis recharged, but we can nowis recharged, but we can nowtry to find a point on the board and intry to find a point on the board and intry to find a point on the board and inthis devicethis devicethis deviceit is . here it is, plusit is . here it is, plusit is . here it is, plusyou see it rings as I found ityou see it rings as I found ityou see it rings as I found itquickly enough, look carefullyquickly enough, look carefullyquickly enough, look carefullyhere, from under this leghere, from under this leghere, from under this legthis thick printedthis thick printedthis thick printedconductor comes out and rushes rightconductor comes out and rushes rightconductor comes out and rushes righthere, the power line, they are alwayshere, the power line, they are alwayshere, the power line, they are alwaysdesigned for high current, so thedesigned for high current, so thedesigned for high current, so theprinted conductor will always be thickprinted conductor will always be thickprinted conductor will always be thickif the design of the smartphone is such that it is notif the design of the smartphone is such that it is notif the design of the smartphone is such that it is notpossible to trace it, but then youpossible to trace it, but then youpossible to trace it, but then youjust need to manually call, roughly speaking,just need to manually call, roughly speaking,just need to manually call, roughly speaking,poke random places on the board and you willpoke random places on the board and you willpoke random places on the board and you willstill find this plus in any case thestill find this plus in any case thestill find this plus in any case themiddle contact,middle contact,middle contact,I also found it by poking in thisI also found it by poking in thisI also found it by poking in thiscase, here it is in this way, thecase, here it is in this way, thecase, here it is in this way, theconnection diagrams for our the battery will beconnection diagrams for our the battery will beconnection diagrams for our the battery will belike this,now for the sake of experiment wenow for the sake of experiment wenow for the sake of experiment wewill try to connect awill try to connect awill try to connect alithium-ion battery herelithium-ion battery herelithium-ion battery herewithout a so-called controller at all, it is clearwithout a so-called controller at all, it is clearwithout a so-called controller at all, it is clearthat of course you can’t do this and youthat of course you can’t do this and youthat of course you can’t do this and youwon’t actually buy such a battery anywhere,won’t actually buy such a battery anywhere,won’t actually buy such a battery anywhere,you need to put something likeyou need to put something likeyou need to put something likethis here. Such batteries are sold inthis here. Such batteries are sold inthis here. Such batteries are sold invery in many stores and youvery in many stores and youvery in many stores and youessentially just need to find a batteryessentially just need to find a batteryessentially just need to find a batterythat fits here in size,that fits here in size,that fits here in size,pay attention to the designation of thesepay attention to the designation of thesepay attention to the designation of thesebatteries, the first two digits are thebatteries, the first two digits are thebatteries, the first two digits are thethickness in tenths of a millimeter, that is,thickness in tenths of a millimeter, that is,thickness in tenths of a millimeter, that is,if it says, for example, 45, then this thickness isif it says, for example, 45, then this thickness isif it says, for example, 45, then this thickness is4 and a half millimeters, the4 and a half millimeters, the4 and a half millimeters, thesecond digit is the width in millimeters thesecond digit is the width in millimeters thesecond digit is the width in millimeters thethird number is the length in millimeters,third number is the length in millimeters,third number is the length in millimeters,this is how almostthis is how almostthis is how almostall lithium polymer batteries are designated,all lithium polymer batteries are designated,all lithium polymer batteries are designated,but as a proof of principle, webut as a proof of principle, webut as a proof of principle, wewill install here this battery onwill install here this battery onwill install here this battery onwhich there is no so-which there is no so-which there is no so-called controller at all, and the resistance will becalled controller at all, and the resistance will becalled controller at all, and the resistance will besupplied by a thermistor with a resistance of 10supplied by a thermistor with a resistance of 10supplied by a thermistor with a resistance of 10kilo-ohms. Youkilo-ohms. Youkilo-ohms. Youmost likely don’t have thermistors on hand, so you canmost likely don’t have thermistors on hand, so you canmost likely don’t have thermistors on hand, so you caninstall a simple resistor, theyinstall a simple resistor, theyinstall a simple resistor, theyjust fell into my hands.just fell into my hands.just fell into my hands.As for the choice of wires in general, theAs for the choice of wires in general, theAs for the choice of wires in general, thethicker the better, I recommend that you do notthicker the better, I recommend that you do notthicker the better, I recommend that you do notuse a single-coreuse a single-coreuse a single-coretwisted-pair type wire because by soldering it totwisted-pair type wire because by soldering it totwisted-pair type wire because by soldering it tothe flesh and even touching it with your hand, you willthe flesh and even touching it with your hand, you willthe flesh and even touching it with your hand, you willmost likely instantly tear off themost likely instantly tear off themost likely instantly tear off thecontact pad from boards,contact pad from boards,contact pad from boards,that is, the wires need to be taken flexible andthat is, the wires need to be taken flexible andthat is, the wires need to be taken flexible andwhen you solder the wires, solderwhen you solder the wires, solderwhen you solder the wires, solderthem in such a way that yourthem in such a way that yourthem in such a way that yourlid closes, do not forget that you still need tolid closes, do not forget that you still need tolid closes, do not forget that you still need toassemble the phone and when assembling, of course youassemble the phone and when assembling, of course youassemble the phone and when assembling, of course youneed to remember that your wiresneed to remember that your wiresneed to remember that your wiresdo not get pressed or shorteddo not get pressed or shorteddo not get pressed or shortedbecause in this In this case, well, as you understand,because in this In this case, well, as you understand,because in this In this case, well, as you understand,nothing good will come of this; thenothing good will come of this; thenothing good will come of this; thethick one needs to be taken only plus and minus thethick one needs to be taken only plus and minus thethick one needs to be taken only plus and minus thecentral wire, which will becentral wire, which will becentral wire, which will beresponsible for processing the temperature sensor;responsible for processing the temperature sensor;it is necessary because ifit is necessary because ifit is necessary because ifyou are going to put ayou are going to put ayou are going to put alithium-ion battery here, here we havelithium-ion battery here, here we havelithium-ion battery here, here we havea minus on the case, so thisa minus on the case, so thisa minus on the case, so thisbattery case needs to be very carefullybattery case needs to be very carefullybattery case needs to be very carefullyinsulated, otherwise when theyinsulated, otherwise when theyinsulated, otherwise when theytouch, when the wires aretouch, when the wires aretouch, when the wires areconnected, you will haveconnected, you will haveconnected, you will havea short circuit here, this contact, but in thisa short circuit here, this contact, but in thisa short circuit here, this contact, but in thiscase you need to solder It’s also very neat,case you need to solder It’s also very neat,case you need to solder It’s also very neat,because down there it’s under thisbecause down there it’s under thisbecause down there it’s under thiscardboard insulator, it’s completely surrounded bycardboard insulator, it’s completely surrounded bycardboard insulator, it’s completely surrounded bya body, that is, this minusa body, that is, this minusa body, that is, this minusis very close to the plus, if theis very close to the plus, if theis very close to the plus, if thesurf pours in there, there could also be asurf pours in there, there could also be asurf pours in there, there could also be ashort circuit, so we’ve essentiallyshort circuit, so we’ve essentiallyshort circuit, so we’ve essentiallycreated an analogue of lithium-polymercreated an analogue of lithium-polymercreated an analogue of lithium-polymerbatteries. now just in casebatteries. now just in casebatteries. now just in casefor insulating thenfor insulating thenfor insulating thensuch a precaution it will never interfere soldersuch a precaution it will never interfere soldersuch a precaution it will never interfere soldernaturally payment is better not earlier than them Inaturally payment is better not earlier than them Inaturally payment is better not earlier than them Ithink you understand this I put the screwthink you understand this I put the screwthink you understand this I put the screwin place right away plus we had it herein place right away plus we had it herein place right away plus we had it hereso I will double check the polarity again it willso I will double check the polarity again it willso I will double check the polarity again it willnever hurt to do it because thenever hurt to do it because thenever hurt to do it because theprice errors here, this is the life of yourprice errors here, this is the life of yourprice errors here, this is the life of yourphone, so I take the positive wire fromphone, so I take the positive wire fromphone, so I take the positive wire fromthe battery and here I touch thethe battery and here I touch thethe battery and here I touch themetal partand as many as eight tenths everything is fine,and as many as eight tenths everything is fine,and as many as eight tenths everything is fine,so I soldered the wire to nothing, not carotid,so I soldered the wire to nothing, not carotid,so I soldered the wire to nothing, not carotid,it seems to be fineit seems to be fineit seems to be fineabove the board like this, the wire doesn’t needabove the board like this, the wire doesn’t needabove the board like this, the wire doesn’t needto be chewed on by the hall I need toto be chewed on by the hall I need toto be chewed on by the hall I need tohide it from the board here, but I connecthide it from the board here, but I connecthide it from the board here, but I connectthe power, it looks like nothing badthe power, it looks like nothing badthe power, it looks like nothing badhas happened yet, everyone is alive, we solderhas happened yet, everyone is alive, we solderhas happened yet, everyone is alive, we solderthe wire to the sensor arm right away, it looks like thethe wire to the sensor arm right away, it looks like thethe wire to the sensor arm right away, it looks like thecontact padcontact padcontact padflew off here, I’ll try to solder itflew off here, I’ll try to solder itflew off here, I’ll try to solder ithere on the side to the connector in something like this,here on the side to the connector in something like this,here on the side to the connector in something like this,I gotI gotI gottatata By the way, what was I talking about, youtatata By the way, what was I talking about, youcan’t overheat these contact pads several times, you can’tcan’t overheat these contact pads several times, you can’tcan’t overheat these contact pads several times, you can’tsolder them off, I just soldered the wire here already,solder them off, I just soldered the wire here already,solder them off, I just soldered the wire here already,and apparently its life time, as theyand apparently its life time, as theyand apparently its life time, as theysay, has come to an end at this moment,say, has come to an end at this moment,say, has come to an end at this moment,but in general you can solder to it quite easilybut in general you can solder to it quite easilybut in general you can solder to it quite easilyand it usually holds the wire justand it usually holds the wire justand it usually holds the wire justfine wefine wefine wewill also need the third pin because without it,will also need the third pin because without it,will also need the third pin because without it,most likely the phone will not charge,most likely the phone will not charge,most likely the phone will not charge,it should turn on, butit should turn on, butit should turn on, butcharging will not happen, but nowcharging will not happen, but nowcharging will not happen, but nowlet’s try this way, I connected the battery right away, I’lllet’s try this way, I connected the battery right away, I’lllet’s try this way, I connected the battery right away, I’llsay right away that it’s a good habitsay right away that it’s a good habitsay right away that it’s a good habitto isolate all random connectionsto isolate all random connectionsto isolate all random connectionsin this way, it’s better to do it so that it’sin this way, it’s better to do it so that it’sin this way, it’s better to do it so that it’saccidental this plus is not shorted somewhere,accidental this plus is not shorted somewhere,accidental this plus is not shorted somewhere,let's check the presence of powerlet's check the presence of powerlet's check the presence of poweron our connector, what we got is, well, thereon our connector, what we got is, well, thereon our connector, what we got is, well, thereis power, as we can see, and the contact of thisis power, as we can see, and the contact of thisis power, as we can see, and the contact of thiswire is also checked, there iswire is also checked, there iswire is also checked, there isa contact, you can try to turn on thea contact, you can try to turn on thea contact, you can try to turn on thephonehello display, by the way, we are completelyhello display, by the way, we are completelyhello display, by the way, we are completelykilled here, I forgot, it’s just bad we are herekilled here, I forgot, it’s just bad we are herekilled here, I forgot, it’s just bad we are herethe image we won’t see herethe image we won’t see herethe image we won’t see hereunfortunately, but as we can see the smartphone isunfortunately, but as we can see the smartphone isunfortunately, but as we can see the smartphone isworking, by the way it gave out some kind ofworking, by the way it gave out some kind ofworking, by the way it gave out some kind ofthing, look, the animation startedthing, look, the animation startedthing, look, the animation startedand apparently it started without a temperature sensorand apparently it started without a temperature sensorand apparently it started without a temperature sensorandandandwe will check the battery charging using thiswe will check the battery charging using thiswe will check the battery charging using thiswonderful copy of a sampire meterwonderful copy of a sampire meterwonderful copy of a sampire meterwhich I already talked about so, my friend, you'rewhich I already talked about so, my friend, you'rewhich I already talked about so, my friend, you'realive with us, what's he doing there? I'm turning onalive with us, what's he doing there? I'm turning onalive with us, what's he doing there? I'm turning onthe charging;the current doesn't seem to be going throughthe resistance, just in case, they checkedthe resistance, just in case, they checkedthe resistance, just in case, they checkedsomething here, obviously not 10 kilo-ohm a7. Isomething here, obviously not 10 kilo-ohm a7. Idon’t seedon’t seedon’t seethat the phone is charging 5 theanimation started up. By the way, it’s possibleanimation started up. By the way, it’s possibleanimation started up. By the way, it’s possiblethat the resistor here was not 10 kilo ohms atthat the resistor here was not 10 kilo ohms atthat the resistor here was not 10 kilo ohms at47 kilo ohms. When you remove the47 kilo ohms. When you remove the47 kilo ohms. When you remove theold battery, you should definitelyold battery, you should definitelyold battery, you should definitelyring the resistance of thering the resistance of thering the resistance of thetemperature sensor in order to find outtemperature sensor in order to find outtemperature sensor in order to find outwhat resistance your sensorwhat resistance your sensorwhat resistance your sensoris used for because you the resistoris used for because you the resistoris used for because you the resistormust be used exactlymust be used exactlymust be used exactlycorresponding to the rating of thecorresponding to the rating of thecorresponding to the rating of thetemperature sensor of the originaltemperature sensor of the originaltemperature sensor of the originalphone battery, because if you installphone battery, because if you installphone battery, because if you installanother resistor, it will not work,another resistor, it will not work,another resistor, it will not work,now it does not start, obviouslynow it does not start, obviouslynow it does not start, obviouslydue to the fact that it does not like the readingsdue to the fact that it does not like the readingsdue to the fact that it does not like the readingson this signal,we are now experiencing what I’m already talking aboutwe are now experiencing what I’m already talking aboutwe are now experiencing what I’m already talking aboutI told him the phone turns on, theI told him the phone turns on, theI told him the phone turns on, thelogo appears, thelogo appears, thelogo appears, thestart animation starts, afterstart animation starts, afterstart animation starts, afterthat the phone turns off because thethat the phone turns off because thethat the phone turns off because thetemperature sensor readings aretemperature sensor readings aretemperature sensor readings areincorrect, so with two resistorsincorrect, so with two resistorsincorrect, so with two resistorswe should get about 12 kilo-ohmswe should get about 12 kilo-ohmswe should get about 12 kilo-ohmsif the resistance is correct the phoneif the resistance is correct the phoneif the resistance is correct the phoneshould be charging, but you see Ishould be charging, but you see Ishould be charging, but you see Ididn’t press the power button, itdidn’t press the power button, itdidn’t press the power button, itstarted now then there is now it, well, evenstarted now then there is now it, well, evenstarted now then there is now it, well, evenhere you can see, in principle, thathere you can see, in principle, thathere you can see, in principle, thatthe indication is that the battery is charging,the indication is that the battery is charging,the indication is that the battery is charging,now we see that we have a charger,now we see that we have a charger,now we see that we have a charger,well, that means 10 kilograms for thewell, that means 10 kilograms for thewell, that means 10 kilograms for theresistor, it turns out that theseresistor, it turns out that theseresistor, it turns out that thesethermistors are marked 10 kiloohms, asthermistors are marked 10 kiloohms, asthermistors are marked 10 kiloohms, as10 kiloohms cannot be used, so I10 kiloohms cannot be used, so I10 kiloohms cannot be used, so Isuggest put exactly ten kilos here thesuggest put exactly ten kilos here thesuggest put exactly ten kilos here theanimation wentnow normal charging went 500now normal charging went 500now normal charging went 500600 milliamps600 milliamps600 milliampsnow it works normallynow it works normallynow it works normallyhere milliampperusususwell I think the experiment can be consideredwell I think the experiment can be consideredwell I think the experiment can be consideredsuccessful we were convinced thatsuccessful we were convinced thatsuccessful we were convinced thatfirstlyfirstlyfirstlythe device with an internal battery isthe device with an internal battery isthe device with an internal battery isessentially no different from a device with anessentially no different from a device with anessentially no different from a device with anexternal battery is exactly the same minusexternal battery is exactly the same minusexternal battery is exactly the same minusplus and the temperature sensor input, in theplus and the temperature sensor input, in theplus and the temperature sensor input, in thesame way we must find these contacts on thesame way we must find these contacts on thesame way we must find these contacts on theboard in this case we saw that without aboard in this case we saw that without aboard in this case we saw that without atemperature sensor the phone does nottemperature sensor the phone does nottemperature sensor the phone does notcharge as its own shouldcharge as its own shouldcharge as its own shouldwork in this case it justwork in this case it justwork in this case it justworks correctly we also see that Theworks correctly we also see that Theworks correctly we also see that Thesmartphone works without a so-smartphone works without a so-smartphone works without a so-called controller at all and doesn’t evencalled controller at all and doesn’t evencalled controller at all and doesn’t evenrealize that it’s not here.realize that it’s not here.realize that it’s not here.We’ll consider this experimentWe’ll consider this experimentWe’ll consider this experimentcomplete. I hope you getcomplete. I hope you getcomplete. I hope you getsomething useful from this video.something useful from this video.something useful from this video.If so, please like andIf so, please like andIf so, please like andsubscribe to my channel.subscribe to my channel.subscribe to my channel.I’m talking about a variety of things, but they areI’m talking about a variety of things, but they areI’m talking about a variety of things, but they areunited by one common idea: how to useunited by one common idea: how to useunited by one common idea: how to useyour technical knowledge to improve theyour technical knowledge to improve theyour technical knowledge to improve theworld around you with your ownworld around you with your ownworld around you with your ownhands,hands,hands,be healthy byebe healthy byebe healthy bye\n"