The Apple iPhone 5s was announced on September 10, 2013. Repair of this device is similar to the previous models, and requires screwdrivers and prying tools. Available as GSM or CDMA / 16, 32, or 64 GB / Silver, Gold, and Space Gray.

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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.

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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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