7 day timers are quite common and I'm very fond of the Diehl timers.
I like their synchronous motor drive timers rather than the standard
electromechanical timers that you may see everywhere. The mechanical
timers will wear out but I haven't had a Diehl timer quit yet. You
can setup a 7 day timer to charge the batteries for a short time once
a week and I think you'll have no problems with the batteries. The
Diehl timers have a motor drive but the power switching is handled
by a relay rather than the standard type electromechanical timer in
which the timer motor actuates spring loaded mechanical contacts.
That's the part that wears out on the old style timers.
It's funny that distributer is named "Borg".
What is the point, just charge before use. To determine if your
charger overcharges or is a smart peak charger a use a volt meter to
measure voltage and check the temperature of the pack. A Nicad 1.2v
cell should stop charging at about 1.3-1.38 v per cell, then the
charger should shut off if its voltage peak, Temp peak charging would
be several degrees above room temp, if pack stays hot or continues to
receive charge then its not a very good charger. My old B&D chargers
were not good. Best is just charge before use there is not need to
maintain 100% charge all the time, those that say leave in the charger
like B&D just cook batteries slowly to death without very good peaking
monitoring. My way of thinking is if the pack is hot its not good for
I like that. It helps to charge a lead battery every month or so, but
nickel batteries don't seem to deteriorate from sitting uncharged.
Part of the plate material can dry if a nickel battery sits for months,
so it may not have much capacity on the next charge. Each recharge
should help moisten the plates and improve performance.
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