The Acebeam X75-BP4 battery pack is a high-performance Li-ion rechargeable battery pack designed for X75. With PD60W-100W and the built-in USB-C charging port allows for quick and easy charging, and the battery pack can also be used as a power bank to charge cell phones and other devices. Keep your Acebeam X75 searchlight powered up for longer periods of time with this high-performance Li-ion rechargeable battery pack. It has built-in four 21700 cells in series and has total 14.4V with 4250mAh battery capacity, this battery pack provides long runtime for the X75 searchlight.