Using high quality batteries such as this 7.4v Lithium Ion HPA battery from TITAN Power provide long lasting reliability and longer gameplay than your average battery. This 7.4v 350mAh is the perfect size for HPA powered AEGS, and universal design of this battery allows it to be used in almost all crane stocks and handguards. This specially designed HPA battery features an integrated on-board sensor to detect when the gun is no longer being used and stops sending power through your airsoft gun, saving battery life exponentially if players forgot to unplug the battery after use. These Lithium Ion batteries are more stable than Lithium Polymer batteries of the same voltage and capacity, completely resistant to leaks and deformations. TITAN Power batteries can store on average 2-5 times the energy of other airsoft batteries, letting you play much longer on a single charge. Be confident you have what it takes to maximize your rifle's potential with this 7.4v 350mAh Lithium Ion battery from TITAN Power.