That's REALLY ironic, because my experience has been the exact opposite lol
I've used and seen lots of intellects with zero issues even after 4 years, but I've had a bad G&P crane stock battery, and a friend of mine got 4 bad ones in a row.
G&P has a high chance of having dead cells on their crane stock batteries. 6/10 2200mah NiMH crane stock packs that I've seen had issues after 2 games. And being charged on a good smart charger too.
Or are you talking about the yellow/orange/green GP batteries? Cause I had a GP battery for my G3 and it was REALLY good. But of course one battery doesn't speak for the whole brand