A very cheap 1536Wh, $ 500 Lifepo4 battery. Actual capacity measurement. For disaster prevention - YouTube
Waterproof Lifepo4 Lithium 500w 1000w 1200w Portable Power Station 110v 220v Generator For Outdoor And Home - Buy Lifepo4 Power Station,500w Portable Power Station,1000w Portable Power Station Product on Alibaba.com