On Mon, 19 Jun 2006 21:11:12 +0100, "Dave Plowman (News)"
wrote:

|In article ,
| Dave Fawthrop wrote:
| No I checked the zig charger it worked fine, just the occasional bubble,
| but over a year the occasional bubble adds up to quite a lot of water.
| The battery I replaced it with works fine after several years, topping
| up with deionised water every month or two. Also Sulphuric acid does
| evaporate, just like water.
|
|The so called 'sealed' or maintenance free battery in my car is over 4
|years old and never been topped up - these days they use a method of
|recovering the evaporation. Of course modern car systems don't overcharge
|the battery - indeed most don't actually take it to the maximum charge.

Leisure batteries are normally of the old type. Maintenance free ones are
rare. I did mention them upthread in the original post if you look.
--
Dave Fawthrop dave hyphenologist co uk Google Groups is IME the *worst*
method of accessing usenet. GG subscribers would be well advised get a
newsreader, say Agent, and a newsserver, say news.individual.net. These
will allow them: to see only *new* posts, a killfile, and other goodies.