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I bought an used iPhone 6, so no warranty here. It’s been working fine for a week but now a weird thing happened. I had my battery at zero and I borrowed my friends charger to charge it. I charged it a bit but it unfortunately fell on the ground during that. It was in a case and it has a protective glass on it so nothing seemed to had happened and it was working fine. Before I got home, the battery went back to zero so I put it my MacBook’s usb port and it surprisingly managed to get charged to 12% really fast but then it stopped and it does not want to charge any more, I dont have any other cable but i tried to plug it into a socket with two different adapters with no success. Also note that the weather is really coled now in my place. And after it stopped chargind I tried to plug it in again after a few tries and my MacBook suddenly turned off. Also I updated the iPhone to the newst ios this morning. Can you help me with that, I will try another cable in the morning but what if it will not help?

It’s important to use original apple chargers. After market ones can damage your phones logic board. Specifically the tristar. It could be that you can simply replace the battery, and be good as new iPhone 6 Battery iPhone 6 Battery Replacement