3 ms·
Folks who do this: how do you keep the battery from bulging and being a fire hazard after a year being constantly connected to a power outlet? I wanted to do t
by iforgotpassword 4y ago
Folks who do this: how do you keep the battery from bulging and being a fire hazard after a year being constantly connected to a power outlet?
I wanted to do this with an older phone that just two wires going to its battery, so I thought I'd measure the voltage and then just use a step-down converter to supply that same voltage to those two pins. Unfortunately no dice, device can't be fooled to think this is a battery and doesn't even turn on.
I also tried just connecting a huge cap instead of a battery, but realized that if it runs empty the board night just assume the battery discharged too much and will refuse charging it. Also it still didn't work when I tried.
- ChuckNorris89 4y ago>device can't be fooled to think this is a battery and doesn't even turn on. Depend on the phone, what battery charging and monitoring IC it uses, but the older ones from the Samsung S2 generation, the ones that still had removable battery, could easily be fooled by adding a resistor to the third BSI/BTEMP terminal (the one in the middle).
- iforgotpassword 4y agoI feared that there was a sweet spot for this in the past. The few modern ones where you can still get to the battery have some proprietary connector with a dozen pins where I wouldn't even know where to start. The one I had was some Noname device from China that really only had two wires going to the battery pack, which I've never seen on any other Android device yet, so I was quite positive given the cheapness that my simple trick would work, but alas.