In article ,
"Dave Plowman (News)" writes:
In article ,
Fredxx wrote:
I have known good lead-acid batteries keep their charge for nearly a
year, but it's rare.

According to an expert on another group the average lead acid car battery
loses 60% of its charge per month. I'm only quoting this FWIW as it's not
my experience. I have a clever electronic battery tester which works out
the actual capacity and that shows nearer 20% per month.

Sounds far too high to me, unless it includes the quiescent drain.

Of course if the battery is left connected in a modern car, the quiescent
drain may well flatten it in less than a month.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]