(ET) Battery eyes?

["Elie, Larry (L.D.)" <lelie ford com>]

Last week, I mowed well under 1 acre on a full charge.  The grass was 
fairly tall, but not that bad; the load (current) meter was not 
unreasonably high.  I normally do about 2 acres on a charge.  I thought 
perhaps I had a weak battery.  In checking, I found ALL 6 batteries very 
low on water.  I could see the plates on all.  It took 3 gallons of 
distilled water to top them all off properly.  There goes at least one 
year off the life of the batteries!  I should have noticed the charge 
cycle was too short (the charge ends up going TO A VOLTAGE as measured on 
the 'fuel' or volt meter, not to a charge content) for a good charge.  The 
charger on the ET is by time, and you don't want to set it long enough to 
boil off much acid.  Anyway, does anyone know where one can get 6 of the 
old 'battery magic eye' caps that used to be used before car batteries 
went cap less?  I don't want to do this again.

On the side.  Now I'm a bit nervous about another 'addition' I was 
planning to the ET.  With the working charger off a parts tractor, I was 
going to run two chargers in parallel on one battery pack.  They float 
just fine and the load is under 20 amps so shouldn't trip the breaker.  
The charge time should be shorter.  Has anyone tried this?

Larry Elie