I have a couple projects in mind that will need a 5v power source, and another that may need a 12v power source. I’m looking for some battery recomendations. They will mainly be things that will use a pretty low draw over a period of time, and sometimes be outdoors (sheltered from weather), so I’d like a battery that could survive a low draw application for a few days between charging?
Size isn’t too much of an issue, I mean I don’t want it to be huge and cumbersome like a car battery, but doesn’t need to be small either. I do want it to be low cost, and simple to recharge (I have a very good lipo/nimh/nicd/pb charger)
Perhaps some sort of lead acid battery? A large bank of AA nimh batteries in series/parallel? Lipos could be nice, but I’ve never found a good cheap low voltage cutoff device for them before.
Any suggestions on a good type to look for?