This GNB battery did the exact same thing some other (but older) GNB's did.
1st , the positive. This thing has power! Unfortunately I cannot measure how much, but the XT60 connector got fused together and had to be cut off(change to XT90)
I am using this in a modified HPI Savage XL. Had been using another brand battery in the car with a higer C rating , but this battery out performs it.
I did however open up the battery to split it inorder for it to fit in both battery trays in the RC car.
Now , the bad.
Used the battery for about 6x cycles before my truck broke. The battery never went below 3.3V per cell (using a LiPo alarm connected when using the battery)
Its been balanced every time after use. But unfortunately, one cell died. It was perfect balanced when it was put in storage. Fixing up the truck took much longer than expected( few months). When I wanted to charge up again , one cell was on 0.0V
Tried to recover it , but the internal resistance is at 40 ( other cells sit at 2-4)
The battery is basically unusable now.