That’s interesting about the 100% , have read that before . Yet the one I bought 100 amp , stated in the manual store at 100% .Seems to be conflicting positions on storage .I have an old school motor guide 12V electric 36. I also have a dakota 100ah LiFePO4 battery with a built in BMS that is now on its 4th season. I run my motor and sounder off the same battery. When fully charged it sits at 13.65 V, when in use it quickly drops to 13.2Vish and stays at 13.2-13.0V from 95% SOC - 20 % SOC. I use my electric for moving from spot to spot and I only use it at one setting, FULL THROTTLE. I seldom charge the battery to 100% and try to keep it between 85%-20%. I use the multimeter to get a better gauge of SOC and charge accordingly. For me one of the very best things about this battery is it loves to live in a perpetual state of partial discharge (40-80%) whereas Lead acid batteries hate being kept in that state. This makes it very easy to use the battery for a trip or two and then just leave it in storage for a long time before charging and doing zero damage to the battery. In fact, the instructions encourage you NOT to store the battery at 100%. If you charge a lead acid battery this way, you permanently damage the battery as lead acid batteries are best kept at 100% SOC as much as possible. At this point my battery still performs exactly as it did when I first purchased it. I got my battery when they were new and very very expensive. Prices have come down quite a bit and at this point it is very hard to justify buying a lead acid battery IMO.