High quality LiFePO4 battery can be charged and discharged 3600 times before it starts to lose performance. Huge capacity of 2560Wh, which can double the capacity of your power station to 5120Wh. Expansion battery is designed for use with Dellonda 3000W Portable Power Station - Model No. DL163. Built-in carry handles that make lifting and transporting the power station easy. Audible alarm will sound at 5% battery to help ensure you never run out of battery.