4 Questions about phone circuitry and charging of battery.
So I've had my Samsung S5 for about 3 years I think. I bought it when it was getting close to not being sold by ATT any longer.
It never worked all that well with battery daily battery life, but over the months and especially in the last couple months, I've gone through several batteries, about 6 or 7 from when I first purchased it.
I know that unused/shelved batteries do degrade even when not used, but I suspect that there is something defective in an IC or in the board circuitry that is damaging the batteries. They get super hot and over a very short time, and it's gotten unusable of late (about 30 minutes of battery lifetime and then fails at 50% charge).
Do any of you know of cell phones having circuitry issues that will cause batteries to fail so quickly, and would this start at the factory, or could it develop over time? I know that with some processors nano dendrites form inside the IC's nano transistor banks if it gets too hot or is over volted, but this isn't talked about much.
If I had the right tools and skills (I did study electronics and soldering a couple decades ago), could I chase down the failure mode and perhaps even replace a given IC or Capacitor? Are there factory cirtuitry manuals?
Update (04/06/2018)
So, when I am able to get the daughter board and other parts I will change it out. But I have a question, will the IMEI or any other number be affected by changing daughter boards and if so, are there any reasons to be concerned? And do I have to use the ATT one (it is an ATT phone)?
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Also, a tie in question, the cost of that daughter board and a battery and rear camera lens cover and case seal adds up to the value of the phone unless I buy for much less. On the one hand, I want to learn how to do this stuff and also I hate to waste the phone, on the other, if I fixed it and sold it, what would I even get for it. But about the IMEI, is the main board what that is stored in, or the daughter board?
由 Mark Hayward 完成的