Charging, Again the deal is that IONIC Lithium does not discharge like Lead acid or AGM, the discharge aperage stays constant, thus not falling off like lead acid does, so the capacity that you actually use is less because it remains at a constant aperage, and not requiring you to turn up the dial for more power, thus less is being used. About the charging of damaging the battery. Lithium does not degrade it can maintain its charge for a year when stored properly. No lead acid battery on this earth can do that, so recognize the fact that you are comparing apples to oranges so to speak. Like I pointed out most every charger has a cut off voltage, I think all do actually. So the charger shuts itself down no matter how long you leave it hooked up in charge state, so it cuts off period. Also on the battery is a management board that monitors all that is going on with it from charging to discharging, not so with lead acid. Bluetooth would be useless for lead acid or AGM because they are dying from the moment they are made. Good care and management help them to survive many years, but after you start using them they can never be exactly like new. However Lithium chemistry can, thats why they have a management board, to manage the battery. I have used them with 3 different manufactures chargers, they are not made specifically for lithium because of the higher voltage, so they really can't overchage lithium, unless there is something critically wrong with the charger. The lithium may be charged at just a fraction off from exactly 100% But realize IONIC are 134 Amp or 54 Amp to begin with, so you get more than you really pay for. So in the end they will show 13.3V most of the time and 99% charged, with the Bluetooth App. I run my trolling motor on 50% all day, but I'm fishing not trying to run a marathon, so the current draw is off and on. In a days good fishing I only average about 1 hour running time to 1.5 hours running time on the outboard. Hey thats why you have to charge the cranking battery and its charge is coming from the outboard, but you can't run it enough to charge the current you draw for all your equipment, unless you run it constantly. And the trolling motor lithiums are way more efficent that, if fishing you never use enough current to pull them down as far as lead acid has to be pulled, thus they charge on average very fast. If the outboard's we use put out enough amperage to charge the cranking battery so as you didn't have to charge it after a day on the lake would be great. So think about that, the outboard cannot supply enough amperage to charge the cranking battery, much less it and 3 trolling motor batteries. You are off and on the trolling motor, but your electronics and livewells and starting amp spike drain a lot more than the trolling motor because they are on the whole day. IONIC and Bluetooth keeps you on top! This is not electronic engineer knowledge, it's more complicated than the words I have used to describe my personal experience over the past 6 years. I am an example of the everyday fiserman, trying to help my fellow fishing friend's. Thanks again guy's.