Can I just put lion's right into my car ? I have to 3.7v 750mah sitting around and I was hoping to just put them right in and then over time pop in a nice motor that doens't need a fet upgrade any suggestions( torqy but still some top end thinking a pn speedy bb)

not a good idea because for one you will blow the fets they go by amp draw and if the motor pulls to much amps poof! then you will need fets anyway
the bb draws .91 amps with li-ons
i'm running 2 3.7 li polymer with a plasmatomic motor and atomicmods v2 and my truck hauls @$$