Ouch, :-( Sunn battery has them for $74.00+ $5.00 shipping. That was in
my first message about the battery. I hope it works for you Bill, really
works great in my RV. Better than any Gell cell, or RG battery I have
ever tried before.
http://sunnbattery.com/item.jhtml?UC...0&PRID=1292858
Jerry

Badwater Bill wrote:
Okay Jerry, I took your advice and spent $135 bucks today for an
Odyssey 16 Amp-hr dry cell that weighs 15 pounds (the 680). I cut the
aluminum for a bracket on the gyroscope to mount it but I gotta get
Kevin to TIG weld it later today.

As far as the battery goes, I hope that MOFO spools me up more than
once and still starts the Rotax 582 to boot. I don't know how much
current I'm pulling on the startup of the main rotor system but I'm
using jumper cable wire and it heats up. I think I'll hand start the
blades a bit first instead of just doing the dead start because the
dead start looks like a dead short for the first few seconds of the
sequence. When I was buying this battery at the store the guys there
told me it was designed for Harley's of all things. They also told me
that a battery that cost's half as much is the Deka Battery. But, the
Deka does have a vent and it's a high pressure vent, where the Odyssey
has none and no acid can leak out.

I've not been to the Deka site to see the specs but I do have a spec
sheet. Nowhere does it say that you can deep discharge this baby like
the Odyssey and recharge it completely--400 times. Jesus...400 deep
cycle recharges on the odyssey and they warrantee it. That's kicking
some tall ass to do that.

Another goofy thing about the Odyssey is that you can't recharge it
using a trickle charger. Less than 1.25 Amps won't put all the energy
back into the battery. You have to use a 10 Amp charger to get back
to full energy. Anybody know the chemistry behind that? I don't get
it. Lead peroxide is lead peroxide. When you drive the sulfate off
the lead atom and reattach an oxygen, what the hell difference does it
make how fast you do it (high Amps)? The only thing I can think of is
that the battery itself has an internal resistance of 7 Ohms so the
higher the current, the higher the temperature of the battery itself.
And, as you all know, for every 10 degrees Centigrade, the chemical
reactivity rate coefficient doubles. So, the rate constant will be
higher for the charge cycle on a hot battery. They say you can
completely recharge this baby in 2 hours if you use 10 Amps. I'm
thinking that it heats up...that's why!

Badwater "I got me a new stinking battery" Bill