I have the 140 ah TimeUSB battery for my 12v min kits 55# thrust trolling motor. I had over 20 hours of use with my trolling motor this past session before I recharged the battery. The BMS told me I had another 4 plus hours of use at that same avg amp draw....estimated 24 hours of continuous use. The battery was at 37% when I hooked up the charger, 6 hours later the battery was fully charged.