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Repair information and guides for the Apple iPhone 5s that was announced on September 10, 2013. Model: A1533, A1453, A1457, A1528, A1530, A1518

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Battery percentage constantly changing sometimes does not turn

HI guys,

As the topic says I have an iPhone 5s which acting weird. Battery percentage is fluctuating sometimes does not turn on or charge.

Now some background information. Originally I was trying to replace broken screen and before doing that I disconnected the battery connector. While doing that I think I have shorted something as I was using metal tweezers (I know not very smart) and saw small spark. My assumption is that I shorted battery connector pin 5 (which is according to schematics is PP_BATT_VCC_CONN) to ground. It could also be other battery pin 4 (AP_BI_BATTERY_SWI_CONN).

So far I have measured all the caps and one filter near the battery connector and they are fine.

My guess then is that I damaged something in battery internals or is it something more serious?

I appreciate if you could help me with this issue.

Answered! View the answer I have this problem too

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It sounds like the gas gauge line (BATTERY_SWI) was damaged. If you already checked the filter (FL11) then you may have damaged the circuit in the battery. I would try a new battery first to see if that solves the problem before attempting any repairs on the logic board.

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Karolis will be eternally grateful.
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