This ELB 32650 Battery are design with 32650 standard size, specially used for electric car, power tools, electric toothbrush, flashlight, speaker, etc. The Main features of ELB 32650 batteries: Super safe lithium iron phosphate (LiFePO4) chemistry reducing the risk of explosion orcombustion due to high impact, over-charging or short circuit situation. Allows fast charge and high current discharge. (Support 2C Continuous Discharge.) 4000tims cycle life@80%DOD. Allows high efficiency charge and discharge cycles. Greater energy density than lead-acid batteries. Faster charging and lower self-discharge. https://www.ecolithiumbattery.com/product/32650-battery/