iphone gas gauge

Published February 12, 2014 at × in Looking inside an iPhone 4/4S battery

The bq27541 in the iPhone battery is on the lower right of this image.

2 thoughts on “iphone gas gauge”

  1. I have a battery but the connector that connects it to the iphone broke off i took apart the battery a few months later to fix it, just to find out htat the battery is dead.. I got to the four silver squares on the battery do you know which ones are which?

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    • Depends on which generation of iPhone you’re talking about. For the iPhone 4, starting from the outer edge of the protection PCB, it’s PACK-, HDQ, NTC thermistor (10k), PACK+.

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