Titan Power 7.4v Stick 1000mAh 25C LIPO

Features:

• Will not form a memory, so no need to use it to it's fullest capacity
• Do not let the battery drop below 3 volts per cell
• If the gun becomes slow or sluggish, stop shooting and charge the battery
• DO NOT allow the battery to get low enough where it will no cycle the gun. Doing so will void the warranty on the battery. 
• High performance Lithium Polymer cells
• 25C discharge rate
• No memory effect