Could it simply be situated in a very warm place or maybe it is dealing with
a higher load on a smaller battery. If its evaporation those plugged cells
do leak much more than completely sealed ones will of course.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"newshound" wrote in message
...
I have a number of used but still functional car batteries which I use for
electric fencers and lighting at a stables with no power.

Some are sealed, but for the ones with removable caps I always remove the
cap and check the acid level before putting them on the charger.

I have just one battery which always has low fluid in every cell when I
bring it back for recharge. It takes an exceptional amount of demin water
each time, at least 50 ml per cell if not more. All the cells are similar.
But, when recharged, it reaches a reasonable voltage and certainly holds a
useful amount of charge.

The cells can't be leaking significantly, firstly there is no sign of it
and secondly this must have done a dozen cycles like this over the past
year or two. I havn't actually checked the acid concentration, I probably
should, and top it up if necessary.

Does anyone have an explanation?