Originally Posted by Tabris17
I would confirm what you have in there and replace it honestly. A 9v is almost two full volts higher then the 7.2v, assuming that's what it is, so while it may work you may burn our your board.
If a 9V is going to risk burning the board would it work just buying another 7.2V batter and charge it to use if the current battery runs out of power? I don't know if any of these are compatible or if they're the same size, maybe you know if they are:
I don't know what the MaH of the battery that came with the gun, or the dimensions of the battery, so I don't know which one of those to get.