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In answer to Walter Dodson's query about "..just buying a battery...etc."

Walt, if you intend to run the hydro pump with just a battery, it'll run
down quickly enough to be quite frustrating. You'll need to purchase a
charger - one with about a 50 amp "Start" setting - to supply most of the
current to run the pump. The battery is needed to supply any excess, such as
the starting current of the pump motor and to provide the regulation and
filtering of the charger's output. Fortunately, you need to buy a battery
anyway so neither of these items are a waste.

I purchased an automotive charger that, besides the "Start" and normal 10
amp settings, also has an automatic trickle charge setting (max. output of
about 1 amp) that I keep connected in the winter when very little flying is
done here in the Northwest. Whenever I need to cycle my gear on the ground,
I hook the charger to the battery and let it do the work.

One of the worst things you can do to a battery is to let it run down and
then let it sit for a while. That'll destroy even the best batteries through
a process known as Sulfation (or is it Sulphation?). Regardless, you need to
keep it charged or it'll go away pretty quickly.

Dan Schaefer

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