Hey Parafal and everyone who was nice enough to help him,
I just stumbled upon this thread because I had the exact same thing happen to me. I ordered a G&P LiPo battery (because i just ordered an new MOE stock for my G&P Zombie Killer) and needed another battery. Like Parafal I was reluctant to get a LiPo battery because i didn't want to damage my gun. It was suggested I get a 20c Lipo battery, which i did, however upon getting it i received the exact same one Parafal got (i'm actually running a 1000 mAh LiPo). That being said I was really happy to find this thread because I didn't know what I should do.