On 27 February 2014 17:31, Chuck Harris <cfhar...@erols.com> wrote: > Backup batteries don't make me queasy. The easiest, > cheapest backup battery would be a small 6V 3AH sealed > lead acid battery. It is trivial to make a good float > charger using a 3 terminal regulator and a diode, and > they do not leak, vent, or anything problematic. The > little 6V 3AH packs are used in emergency lighting, so > they are readily available. Float them at 6.9V, and > they will last at least 5 years.
I thought there was an issue with even "sealed" lead acids of them emitting small amounts of sulfuric acid, which is not great in a bit of test equipment. Dave _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
