[lurkingknight]

don't leave lipos unattended while charging. EVER. Charge them in an area away from flammable things, in a non flammable container on surface. The lipo bag is pretty good, but still keep it in an area away from burnable things while charging.

There is no need to discharge them for storage or transport.

if you use hobbyking nanotech lipos, they have an emergency shutdown at 3v per cell.. but best to have another means of monitoring voltage like a voltage monitor or a computerized mosfet that can monitor voltages.

20C discharge or higher batteries are ideal, 15C batteries are just barely enough to run airsoft guns, and they tend to trigger voltage alarms prematurely because a gun motor is drawing close to the battery's max amps. They work, but there's not much wiggle room.