7.4v or 11.1

[Trenchrunner]

Right here is a noob question but here I go. I've recently upgraded my aeg with a titan mosfet, I mainly got the mosfet to increase the life span of the trigger fuse but thought I'd go all out as it sounded fun! My question is should I stick with the 7.4vbattery that g&p reccomends on the box or will I be able to switch to 11.1 to get the full potential out of the mosfet every now and again?