[DMCForum] Re: Battery?

["Walter Coe" <Whalt@xxxxxxx>]

> (Most lead acid batteries will fail to
take a new charge after as little as a dozen cycles.  They
are not
designed to be drained.)

Andrew, I think that a dozen cycles for a regular flooded
cell lead acid battery is very optimistic.  It is probably
closer to 3 or 4 cycles.  I never trust a battery after it
has been discharged once.  The Optima literature says that
the red top series can be cycled twice before you start to
kill them (or something to that effect).

I think that the deep cycle yellow top is definitely a
battery to consider.  The only disadvantage I have heard
with it is that they have less CA capacity and recover
slower which may not make it a good choice in a car.  But
newer models may be up to the job.

> (People who think that a UPS is designed to
be used to cover extended power outages are sorely mistaken
and learn
expensive lessons when their UPS batteries die after a dozen
cycles.)

I wondered about that since alarm systems and battery backup
fire/emergency/exit sign lighting uses the same kind of
battery as UPSs.  So I figured they were some variety of
deep cycle.  Go figure.

When the power went out during hurricane Francis, I used a
UPS to run the TV for about 20 minutes.  When the battery
got low enough, I tired hooking it to a car.  For reasons I
don't understand, my UPS would not start up hooked to a car
battery.

Walt

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