Originally Posted by Daiviet
Nothing wrong with it, they just require a lot more care than typical batteries. You have to watch out for overcharging/discharging the battery since it can explode. It can be kept in check with a Balancer that plugs into them.
There's also a risk that if its stored in an open RIS handguard, a BB could hit it. Then BOOM.
IMO if you're gonna run a lipo up front, store it a proper housing (like an AN/PEQ) to prevent it from getting damaged and save yourself the hassles/potential injuries.