The 10x20x40 mm LiPo 7.4V 250mAh 25C HP Battery is an exceptional replacement battery for long-lasting power in V-12 motors and electric pistol replicas. Its compact size allows for use with HP motors, and its small power drain means frequent charging is no issue. With a higher capacity to size ratio, LiPo packs are superior successors to traditional Lithium-Ion packs. They have no memory effect, can be charged frequently without fully discharging, and have a low self-discharge rate. It is important to remember to not let the pack discharge below 3V per cell or overcharge above 4.2V per cell. LiPo packs also perform well in low temperatures and should be charged at room temperature to maintain their good condition. Balancing is necessary during charging with a compatible connector. LiPo packs have an average lifespan of 500-700 cycles when used properly.