5-Year Warranty for Peace of Mind: Instead of the average industry warranty length of 2 years, purchase FOSSiBOT F7200 Portable Power Station Expansion Battery worry-free with a 5-year full-device warranty. Long-Lasting Power: 5222.4Wh capacity with over 6500 charge cycles for reliable performance. Low-Temperature Performance: Operates in extreme conditions down to -10°C. Safety Certified: Intelligent BMS with 9 Layers of Protection Note: FB5222 Battery Pack is compatible only with FOSSiBOT F7200.