Genuine Ziewnic lithium battery, Li-Wall V2 – 25.6V, built with LiFePO4 cells for solar energy storage. Key specs: Battery Type: LiFePO4. Normal Battery Voltage (VDC): 25.6V. Normal Capacity (25C, 0.2C) (WH): 2560WH. Voltage Window (VDC): 22.4~28.8V. Solar Charge Voltage (VDC): 27.6V. Max. Continue Discharge Current (A): 100.