Using high quality batteries such as this 7.4v Lithium Ion battery from TITAN Power provide long lasting reliability and longer gameplay than your average battery. 7000mAh batteries can last players up to a week of gameplay on a single charge, eliminating the need for additional batteries. The universal design of this battery allows it to be used in almost all crane stocks and handguards. These Lithium Ion batteries are more stable than Lithium Polymer batteries of the same voltage and capacity, completely resistant to leaks and deformations. Be confident you have what it takes to maximize your rifle's potential and play all day with this 7.4v 7000mAh Lithium Ion battery from TITAN Power.