[time-nuts] Battery backup of frequency standards
brooke at pacific.net
Thu Jun 9 10:48:28 EDT 2005
You might consider getting a BA-5590/U military battery, see:
These are really two seperate batteries, each one made up of 5 LiSO2
cells, 15 volts per battery, 30 volts if connected in series.
These are primary (not rechargeable) batteries with a shelf life well in
excess of 10 years. (I have some 14 year old units that test at 100%)
Between 170 and 210 Watt hours depending on which manufacturer and date
you get. You need to be extremely careful NOT to charge them.
Brooke Clarke, N6GCE
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
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