Help with airsoft gun?

Any battery with the same connectors as your gun will work (be aware of the size too). I would recommend nicad/nimh batteries for beginning airsoft players and lipoly for the experts. The higher the "mah," the longer the battery will last. The higher the "v(oltage)," the higher the RoF (rate of fire). Don't use the standard wall charger that came with your gun, invest in a smart charger. Smart chargers automatically stop charging and notify you when the battery is fully charged.