I purchased 2 of the Pwerurus 12 volt 100 ah for my 24 volt trolling motor on my boat last spring. This was before I knew about Epoch batteries. I watched a few you tube video tear downs and the build quality was excellent. They have performed flawlessly for me so far. The Powerurus batteries are manufactured by RoyPow. Love the Blue tooth on the batteries, which allows me to monitor the batteries also. I have trolled all day with plenty of battery power left.