New member here but maybe something to add.
My short experience with LiFePO4 has been positive. CHINS 12V 100aH bought this spring at Amazon for $319. I've charged with a 3 different chargers (only 1 Li-dedicated) and I don't see much difference in the amount of current I can stuff into the battery. Kept the dedicated Li one b/c it's faster @ 15a.
On the cheap batteries w/o Bluetooth install a $30 monitor (it must have a Hall or shunt) which tells you how much juice is going in and going out, voltage, etc. Since the discharge curve is so flat, voltage measuring alone tells you nothing. At full charge I can put in about 1.3 kW which is more than rated specs.
On my last full charge I've been out twice for about 3 hours total (MK Powerdrive V2 55#) and I'm down to 1.2kW. I've taken the battery down to 12V which is about 10%, didn't want to take any further down. The nice thing about the meter is it goes both directions +/-.
The other major reason for Li is weight. I have 2 boats that share a battery. The LiFePO4 weighs 24# vs. 85 tons for the Pb.
I am careful with the battery, don't leave it out in the rain, sleeps in my bedroom. But 24# it's no trouble to move.
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