actually guys ..those GP batteries work really well.
I have Nimh GP batteries with the charger.
It works well for my GP32.
BUT I mainly use it with my transmitter and Mini-Z.
a 1 hour charge, and lasts for about 12 hours on a non flu GP32 with a wormlight attachment.
I have a set of those, they last about 5-6 hours (on my almost constantly overclocked FLU ) and having GP on them is cool in a nerdy way. I also have some 2100 batteries, they last close to 10 hours.