Chosen Solution
I have an iPhone 5 that came to me with a battery problem. It was dead when it arrived so I put a brand new battery in which got it working fine. The next morning it was completely dead again. Nothing when I connect to iTunes either. So I put another battery in and same story. Works fine then the next morning its dead. Both batteries are completely dead, I’ve tried them in a working phone and nothing. Each battery I tried was from a different vendor, and I also put one of the same batch into a different phone at the same time and its still working with no problems, so I think its safe to say its not the batteries themselves causing this. I have a feeling its the logic board rather than the lightning port killing the batteries. Does anyone have any ideas? I don’t really want to spend any more money on a new lightning port as I have killed two batteries and I have a feeling its not gonna sort it. If anyone has a clue, please share.
It could still be the batteries but at this point you need to isolate some variables. The batteries appear to discharge fairly quickly (it should last more than an overnight, unless it is being used heavily). It doesn’t sound like your phone is recharging the battery either. So you may have a bad battery, a short that is draining your battery or a charge circuit that doesn’t charge…or it could be any combination of the three. If you have access to another phone, try putting a “bad” battery there to see if it will charge and work normally. Likewise, you can take a known-good battery from another phone and put it in the suspect phone to see if it takes a charge. Always use genuine cables and charging bricks. If the problem is related to the phone, then it may be a bad Lightning port but it could also be a defective charging circuit. You could always use the Lightning port from another phone rather than ordering a new one. If the charge circuit is bad, that will require a micros-soldering repair.
Are the batteries DEAD DEAD or will they just not charge? There are some tiny resistors next to the battery connector that help control the power to and from the battery and if even one of those gets knocked off the phone loses it’s ability to charge batteries. It’s a little difficult to see them without a scope but you can try to use a magnifying glass as well. Hope that helps!
