>
>What value do you use?

Short answer:  Large

Long answer:  Find out the battery's self discharge rate.
Make sure that "Large" results in a current that is not less than 2-10* the
self discharge rate.
Very dependent on the exact battery.

If you can't get that info, then just calculate for a low current.
You definitely want it to be <= C/100 in this service.

In either case, you need to know the range of variability of the charging
voltage.


--
Dave's Engineering Page: http://www.dvanhorn.org
Where's dave? http://www.findu.com/cgi-bin/find.cgi?kc6ete-9

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads