My APC 12V 140Wh Lithium UPS is dying. Both it and the 120V leaden ones for long run time are long discontinued. The last power outage was about 3+ hours, and my system failed. The older gear was good for 8-12 hours originally (3 separate UPS in 2 locations). Most all of the modern leaden UPS are only good for 60-90 minutes due to the cheesy designs. Generator power is not feasible. I found some low capacity Chinese Li-ion 12V UPS in the Jungle store, but the quality and safety is dubious. I don't want a conflagration. Thanks for any product ideas.