Chosen Solution
One day I wanted to try out a new car charger I got and plugged in my phone didn’t hear the charging sound so went to look and the phone was off haven’t been able to power it on since and have tried everything. I checked the output on the car charger with a meter and it’s the correct voltage so i’m thinking maybe it was a defective cable. I opened the iphone to see if maybe the battery went bad all of a sudden, I get the correct voltage on 2 pins of the four I think the other two are for charging, so I don’t think the problem is the battery. Does anyone have an idea what i should try to troubleshoot next or what parts i should buy from ifixit to try and revive my phone. Thanks in advance.
Okay now here is a goofy suggestion ;-) have you replaced the battery yet? That is where I would start since yours could easily be at the end of its anticipated lifespan. Then you also have a clean starting point for further trouble shooting. Once you have a new battery, reevaluate the charging of the iPhone. If it still should not charge, follow the advise given by Scott Millard and clean the dock connector. Also remember to check the charging fuse on your logic board. That is all I have for now and I am sure with the help of the iPhone guru’s on here you will be back in action soon. Oh yeah, BTW the iPhone uses a lithium ion polymer battery. The battery has a capacity of 1219mAh and 3.7 volts ref with Standard Voltage of 3.7V and a charging limited Voltage of 4.2V and if I remember right what I read about the charging specs from an iPod (I know its not iPhone) correctly it could be charged at anywhere from 5-30VDC (remember firewire :-)) Internal circuitry regulates this down to a suitable voltage for the battery, then internally cuts off the charger when the battery shows a full charge. Good Luck. iPhone 3GS Battery
I just had the same problem today. I ordered a cheap charger from china $5 free shipping! Was in my car, listning to a podcast, surfing on safari. All of a sudden screen dies, bluetooth disconnects. The whole thing is dead. I cant turn on, reset, or put in dfu mode. Got home tryed different charger and Itunes, still nothing. So I took it apart. Took out the battery, 4. something volts. Checked “fuses” had continuity. Put back together and powered up fine. Wtf?
Mine has done the same thing with a australian made car charger. any help is welcome!
Hello Guru’s iPhone 6 got turned off after using chinese car charger, it used to charge my mobile before but yesterday when i put it on charge mobile having 20% battery suddenly got turned off and now after trying several (original) chargers mobile is not turning on. Also i have tried Dfu, hard reset and everything mentioned above. Please guide.
Is this problem solved?? Because Im facing the same issue here pls help with this!
Open the iPhone then disconnect and reconnect the battery cable and re-assemble, then connect to iTunes - it should allow you to restore from an iCloud backup. It worked for me.
