[GBear]

For ALL LITHIUM BATTERIES, you should be using a PCM (Protection Circuit Module). You do not want to overcharge/overdischarge/overcurrent ANY Lithium battery. Dropping the voltage too low will collapse the entire graphite anode structure, making the battery lose all capability to hold charge. Overcharging will cause Lithium metal to form on the surface of the anode. If you know your chemistry, you know how dangerous and reactive Lithium metal is. Any of these will cause bulging (the formation of hydrogen gas) within the cell, which is extremely flammable. Explosions can also happen. Lithium batteries are VERY dangerous if you don't know the proper precautions.

Just a warning. Be sure you know what you're doing.

By the way, I just got a VFC SCAR-L too! It just got delivered to my house. I can't wait to go home and shoot it! It's my first gun. :X