How to charge a little a battery externaly
I have 2 ipad mini first generation that both have the same issue. Not powering on, not recognized by Itune when connected to a PC and indeed, not charging at all.
All these symptoms make me think about the bloody U2 IC charging chip 1608A1.
To be sure about that the good thing would be to charge the batteries for not more that 2-3% as it should be enough to enable me to start them (assuming it an U2 IC issue). Can somebody give me an advise about the charger to use and which input voltage / mAH must be used (I know that the output voltage is 3.72 V 4440 mAh but not sure for the input ) .
Thanks for the help