GBPT used in charging

Anyone happen to know what a GBPT in charging a lithium battery is?
Marked u1 and u2 on the board.

Those look more like balancing/protection components than a charger?, the charger circuit is probably elsewhere.

The charging portion is separate on this flashlight.
I couldn't find anything on these GBPT components.
The flashlight has a red and green indicator for the battery and it's been in the red when charging but when I just looked at it, it was still red and then switched to green when I started running my hand over the components looking for a heated defect.
I must have touched something that caused the indicator light to switch from red to green.

Possibly a BD4941, a 4.1V reference+comparator; that could make sense in a lithium cell balance control circuit?
The surface mount code is GB (plus a date or batch code).


This is the best surface mount device code look up site I know of:

I believe you are right RJ, I have 4 volts going into it and nothing coming out, probably because the batteries are charged and the ground is where it should be so thanks for all the information you posted.