On 11/05/2012 09:10, Tim Lamb wrote:
In message , The Natural Philosopher
writes

buy a trickle charger and a waterproof pot...

Or a mains energizer! Actually these seem to *tick* on medium wave radio
reception.

Or a PV panel and/or a Rutland Windcharger, if it's too far away from
the mains.

Hence the probably flat for weeks battery :-(

That's guaranteed to kill any type of Pb-acid battery IME. NiFe, NiCd
and NiMH don't suffer that way, provided you don't allow individual
cells to become reverse-charged.

--
Andy