[lurkingknight]

borrow one first to try.

Trigger circuit on the mosfets are usually very low amperage and voltage to get to operate the main switch. It shouldn't matter what your output is unless the mosfets g&g used are very poorly specced for the intent they're trying to use them for. AFAIK fets don't care about the main circuit, once the gate circuit connects it just opens up the main switch and whatever power is there will go through with no resistance. It's up to the system draw at that point to pull what it needs. Throwing more volts and amps through it is a bandaid fix. If they hardwired the things to have low voltage cutoffs that would cut off anything lower volts than what would be minimal 3 cell lipo packs, that would be the dumbest thing ever to design, but I wouldn't be surprised if they did the hardware to do it. I'm no EE so that part of it is beyond me. It just seems stupid to design something that blocks out the usage of anything that isn't a 3 cell lipo.