Battery Question

i opened my clip to see what the problem was with the thing and found one side of the battery pinched from being put together and my positive cable was off. i figure what the heck. to our super geniouses out there. anyone see a problem going from a 330mAH to a 750 mAH battery?

Other than it physically will not fit inside the player (due to roughly twice the area) - no problem at all!