Review on Renogy 12V 100Ah Lithium LiFePO4 Deep Cycle Battery With Bluetooth,2000+Deep Cycles,Backup Power Perfect For RV,Off-Road,Cabin,Marine,Off-Grid Home Energy Storage by Stephen Doyle

The 1) size, 2) weight and 3) longevity are the reasons I purchased and the cost was major con. The size and weight reduction get 5 stars. Longevity was a fail.Used it sparingly on RV since Nov 2020. Kept it in a container, inside the trunk on RV, within a storage shed when not in use.well protected. Made sure I topped off charge every few weeks if not in use. Last week charged to 13+v and this week it has 0.05v. All RV leads were taken off and still it won't take a charge. Even bought a compatible solar panel from Renogy to charge and it wouldn't hold. Renogy could not acknowledge the purchase, since the order was on Revain. Revain couldn't refund since out of their time window. Revain was very supportive and helped with an AGM replacement. Maybe there was a maintenance plan during purchase, but I found nothing available on that.At the time it cost $499.99. It lasted 1yr 9mos 2wks. Was used on several short RV trips and was cared for way better than the deep cycle batteries I had on my boat for years.The pitch is spend more last longer. I'm not sure exactly the issue I had, but I know how to not have the same issue again.