Using high quality batteries such as this 7.4v Li-Ion battery from Valken Energy provide long lasting reliability and protection against self discharge and other factors that greatly affect the lifespan of your battery and overall gameplay experience. Due to the convenient nature of all lithium ion batteries, they require zero maintenance to ensure peak performance. These batteries utilize Samsung’s new high discharge technology and feature a Protection Circuit Board to prevent the cells from over-charging and over-discharging. The much higher power density and low self-discharge rate provided by lithium-ion batteries offers a distinct advantage over other types of batteries in AEGs. Be confident you have what it takes to maximize your rifles potential with this 7.4v 2500mAh Lithium-Ion battery from Valken Energy.