no there is no other battery that fits the mp7. BUT there is a external battery adaptor that allows you to plug a larger battery in but it's a tactical force mp7 so dont bother putting money on this gun... gearbox isn't made to handle 300 fps and it comes stock with it so... with the 7.4v you will be lucky if the gun lasts 10 000 rounds (personnal experience) so if you are putting a larger battery the mechbox will die faster
my 2 cents
