NiCd Plate exposure? [RE-wrenches]

[Mr. Sharkey]

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OK, I'm posting a lot, two questions in one week...

Running in RE mode this holiday weekend, I'm attempting to recondition a 
set of Alcad UHP65 Nickle Cadmium cells. There are twenty cells that were 
used to start the backup generator down at city hall and have been sitting 
dead in my yard for six years after sitting dead in the basement of city 
hall for an unknown period of time.

I've got a pretty good handle on recharging, exercising and testing 
capacity on the cells, but have one unknown that I'd like some advice on, 
so I'm turning to my knowledge base. Richard Perez, if you're still 
monitoring, this might be your opportunity to shine as you always do...

Fourteen of the cells had adequate electrolyte level when the battery was 
decommissioned. Two of the cells have electrolyte within a half inch of the 
lower level mark (below that mark), while four have levels ranging between 
an inch and four inches below the lower level mark.

Question: What status should I assign to the cells with electrolyte levels 
that allowed the plates to be exposed to air? Are these a lost cause? Can 
the electrolyte be topped up and I'll be back to good-as-old, or is it a 
crap shoot (try it and see)?

I'd like to get two twelve-volt batteries out of this so I can use them to 
start my motor coach at 24 volts, but would be satisfied with salvaging ten 
of the cells for 12 volts (the bus has a 24v starter, but has been running 
on 12v after the series/parallel contactor was removed before I bought it). 
The UPH65's are rated at 1850 short-circuit amps, so I think they should 
have the muscle to do the job if my recovery efforts are successful.

Any facts/opinions?

=====================================

"History has never been kind to people who fail to control their leaders" 
-Mark Stanley

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