PRICES MAY VARY. The Most Reliable Emergency Power Supply: Industry-leading safety and reliability designed with electric-vehicle-grade battery cells. Every unit undergoes 52 reliability and safety tests and is covered by a 5-year limited warranty. Long-Lasting Capacity: Each portal power station has 1,002Wh (278,400mAh). Offers up to 7 days of power supply to your crucial devices and home appliances on a single charge. Powerful Output: 3 AC outlets with the pure-sine wave, supporting 1000W rate