Rechargeable for 500 uses, with a lifespan loss of less than 20%. BMS always monitors the working status of the battery to provide protection for charging and discharging. Battery has overcharge protection, over discharge protection, over current protection, short circuit protection, and balance protection. https://batteryint.com/products/25-2v-4ah-rechargeable-replacement-battery-for-jetson-rave-hoverboard