Lithium batteries are in the process of being the next best thing, but...they are still in the process. Lithium takes a whole heap of looking after, too low a voltage, they are dead, big expenss for that to happen, but on the other side, they store large amounts of electricity for a large amount of time. I'm just not convinced yet as to their praticality in the RV world, no doubt they will be one day, just not convinced yet for today. Just the fire potential along is very high and talk about high mantenance. I'll wait until they have a few years behind them and the price comes down
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