Airsoft Station carries a variety of batteries for your airsoft gun. There are three important things to note when selecting a battery. First: Plug Type - The plug type determines how the battery will connect to your gun. There are three major types of plugs on the market today: Small Type Tamiya, Large Type Tamiya, and Deans.
The second consideration is voltage. The higher the voltage the battery has, the higher the rate of fire for your AEG. Most guns can operate with either 8.4v or 9.6v batteries. 9.6v batteries will maximize the rate of fire on most AEGs. The third consideration is capacity. Capacity of the battery is determined by the mAh rating, or milliAmp hours. The higher the mAh rating, the longer the battery will last before it requires recharging. A general estimation for how long a battery will last is roughly 2 BBs per mAh, thus a 1200mAh battery should allow your AEG to shoot approximately 2400 BBs before having to recharge.