PB G3 PDQ battery component

[Bolacore]

In the process of rebuilding my PDQ’s battery and found that even with fresh cells I had zero volts at the output terminals. Battery reset program did not make a difference either. I started tracing back and found this odd looking component is open circuit. If I jumper it the battery appears to work great, but ideally I’d like to replace it as its presence near a few resistors called SR1 and SR2 makes me think it is like a 3 wire current shunt resistor.

Any idea what it might be? Part numbers aren’t turning up anything helpful.

 

[GRudolf94]

SR1 and SR2 are the shunts proper. Laptop batteries (and other smart/managed batteries) often have a heated fuse that the BMS has control over. If the pack goes outside spec beyond a given margin, the BMS can blow that fuse on command to isolate the cells. Now, I've never poked at a G3 pack, but that's the edumacated guess I'm going with.