In article , The Natural Philosopher
writes
On 01/09/16 03:28, bm wrote:
"Dave Liquorice" wrote in message
idual.net...
On Wed, 31 Aug 2016 22:47:28 +0100, bert wrote:

Car batts ever have responded well to being discharged. The op may well
find that something like an alarm or immobiliser is slowly discharging
the battery.

yep, all manner of stuff is quietly running when the car is "off".
Mine apparently is aware of this problem and if the battery voltage
gets too low (FSVO "too low") it goes into a really deep sleep and
has to be opened manually, via the one door that actually has a
(hidden) key hole.

If you are leaving it unused for some time best disconnect one lead.

Or do as I did when I left my car unused for the last month. A small
solar panel(*) on top of the dash board facing SE, connected to the
battery. Car opened and started without a hint of a flat battery. Not
conclusive, one would need to leave it for a month without the solar
panel and see if it went into deep sleep, that's not going to happen.

(*) Halfords/Maplin £15 15" x 5" ish, 12 V, 1.5 W, 86 mA at max
power.

Yep, this is progress.


Finally, a use for a solar panel.


I tried one on my caravan - pretty useless except when in direct
sunlight.
--
bert