"Marui OEM" I fell for that one too, but this was before HL tanks were known about. Around 4 years ago I bought a "marui 1/24" which came with a rechargeable battery pack, was sold as the newer version, replacing the "old " dry cell version. I paid an embarrasingly large amount for it, so think yourself lucky you are not too embarrased to tell us how much you paid. (cos i'm not saying)