You can set up a regulated voltage where the cells can float "forever" being some number of years. A constant current isn't bad as long as it's small relative to the AH rating. C/ (>20) kinds of small. Part 2: That may be possible, but there's a "surface charge" effect that will give a higher voltage for some amount of time. I wouldn't trust it unless you had an algorithm with some research behind it. Would it be helpful if you could borrow my CBA-II? It's a USB controlled battery discharger that will do a set amount of current and give you discharge curves. I'm in Broomfield. On Fri, Feb 7, 2014 at 3:42 PM, YES NOPE9 wrote: > This is a question about Sealed Lead Acid batteries. If one slow charges > an SLA using 13.5 volts through a 10 ohm resistor, can this be left in > place forever ? > Next ..... assuming a *rested battery* showing 12.5 volts ( that is the > correct voltage for a healthy SLA is it not ? ) , can one ...... load it > with a 1 ohm resistor , measure the voltage change and calculate ...... > either the Ah of the battery or it's ability to deliver amps for a short > time ( cranking a starter motor for example ) ? > Gus in Denver > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .