In article ,
Huge wrote:
P.S. re-reading your posting, the reason people suggest disconnecting the
battery is that most modern cars have a substantial current drain even
when switched off (I've measured it at several hundred milliamperes). This
will rapidly flatten and then ruin a car battery. Which is why I use a
float/trickle charger (sometimes called a "battery conditioner").

If you take a fairly normal (large) 75 amp hour battery, a drain of 1 amp
would flatten it in 3 days. Pro rata for a lower current. And it would
fail to start before the battery was totally flat.

Most cars can last about 3 weeks without being run. Which would suggest a
quiescent current draw of rather under 100mA. But it may be higher until
the electrics finally go to sleep.

--
*Do they ever shut up on your planet?

Dave Plowman London SW
To e-mail, change noise into sound.