Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
"Jim Wilkins" fired this volley in news:ldvh46$n22
:


There was someone in this group about a year ago talking about
refurbishing old batteries which used a steel (or perhaps cast iron)
tank. I forget what the anode was. And I think that it used NaOH
(Sodium Hydroxide) as the electrolyte -- lye instead of carbide.
Perhaps this is what the tank was.

Enjoy,
DoN.

http://en.wikipedia.org/wiki/Nickel%...93iron_battery

http://www.zappworks.com/battery_prices.htm

That's a terrible web site! They advertise a cost of '20-25% more than
lead acid", then ask $3300 for a 250AH battery! A 250AH lead/acid costs
in the range of about $220. So what is that price -- a pallet of 10?
They sure don't say so...

Then, in their specs page, they say one "should keep a 1/4" layer of
consumable grade mineral on top of the electrolyte". Oooohhhkay! Which
'grade mineral' might that be... basalt? granite? Ohhh... you mean't
"Consumable-grade mineral OIL!".

These guys are illiterate, incompetent, or liars. Asking 50% up front
and not shipping for 30 days after receipt of payment makes me leery. Of
all the types of batteries available, those can be built and stored
almost indefinitely -- so why would they not have stock ON HAND?

the first giveaway that these batteries are complete made in a shed trash
is how the cover is fastened. Note the two visible screws.