Can anyone ID the chip on the logic board responsible for battery

Hi, I am trouble shooting a liquid damaged MBP that does not charge the battery. It will startup with the battery in place but not from just the charger, however once it is running it runs off of the charger and I can even remove the battery.

I am wondering if any one has Identified the MUX chip responsible for managing the charge functions on this logic board.

thanks

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Here is an annotated photo of what I have puzzled out so far. Any input would be appreciated. The voltages in green are the AC only, the voltages in orange are with charger showing the battery as charging but it is not really charging. The voltages in white are from a properly functioning logic board which is charging.

http://home.epix.net/~dlbx2/2010_logic.j...

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