

I know NiMH are way easier to charge, but lifepo4 has better capacity and way more charging cycles I believe.
The tricky thing with iron phosphate is that the voltage level between 75-80 and fully charged is very flat, so it’s difficult to reliably know the state of charge.
I’ve been thinking of setting up a node at my local ski area, both for others to use, but also to make custom timing equipment that can send start and finish messages to the timing computer and keep us from having to haul wires up icy race courses all winter.
I’ve never actually set one up or used one yet though, so it’s probably a few years off.