Introduction: DIY LiPo Li-Ion Battery Charger From Old Cellphone
Do you need LiPo or Li-Ion charger but new one or kit is just too expensive?
Well i got same problem and they can cost up to 20$
Luckly i got old phone and it have integrated charging circuit which i need
It can charge 1 LiPo or Li-Ion battery and since i removed battery that is used to remember date and time when i plug battery time will be 00:00 so i can see how long i'm charging battery
I couldnt find original charger but online i found it used 4.95v 500 ma charger so i build my own using lm7805 voltage regulator
Also i put power switch from phone and screen on clear panel and leds from phone keyboard are used for nice green light
For connector i used some 3 pin and solder it on old battery tabs and for battery input i've put pins +- and middle one so i can charge any LiPo,Li-Ion battery that have 2 or 3 pins