Mango Power E Battery NOW 10 Year Warranty Best in Class CATL Battery as used in Mercedes Benz, Tesla, BMW cars Only 1.5 Hours Re-charge time Safest LFP technology Multiple Use Cases emergency and recreational Fully surge Protected This add-on battery connects with a Mango Power E Portable Power Station to increase the level of backup power for your house. In order to keep your house and family powered during lengthy blackouts, the enhanced Mango Power E provides two times as much capacity, or a total of 7kWh. Mango Power E Power Station has a power capacity of 3.5kWh and the Mango Power E extra battery a capacity of 3.5kWh. Add the Extra Battery to the Power Station to get a total capacity of 7kWh. You can also combine maximum 2 Mango Power E with 2 Extra Batteries together with the accessory mSocket Pro for a total of 14 kWh in capacity. What's in the box: 1x Mango Power E Battery 1x E+ Connection Cable 1x User Manual 1x Warranty Card Specifications: General:Net Weight: 73.1 lbs (33.18kg)Size: 17.8x13.6x12.5 inches(452x345x318mm)Working Temperature: Charging: -20°C~60°C / Discharging: -30°C~60°CWarranty: 10 yearsCertificates: Meets US and International Safety and EMI StandardsIP level: IP21Battery:Battery Capacity: 3.53 kWh Cell Chemistry: World’s best CATL LFPLife Span: Capacity Retention >70% after 6000 cycles (@25℃, +0.5C/-0.5C) Battery Management Systems: Over Voltage Protection, Overload Protection, Over Temperature Protection, Short Circuit Protection, Low Temperature Protection, Low Voltage Protection, Overcurrent Protection Max charging rate: Up to 1.1CInput:Charging Method: AC Wall Outlet, AC AdapterAC Charging: Max 3000W (by connected to MPE)/AC AdapterOutput:Output Ports: 3USB-A: 1 x QC 3.0 27WUSB-C: 1 x PD 100WCar Power Output: 12V/10A