High power 8.4V 2200mAh battery. Fit only G&P AK47 Metal Front Receiver (Code: GP036).
If you intend to use this battery in other AK47's not made by G&P, then you may need to modify the receiver of the gun by drilling through a hole into the front section of the receiver (below the rear sight) so that this extended long battery will fit all the way forward into the front part of the receiver. This is very easy with Marui type plastic AK47's since it only requires snapping through plastic, but might be more difficult on other metal receiver AK's not made by G&P.
G&P AK's already have this modification made at the factory for the purpose of installing this extra long battery.