In article ,
Tim Lamb wrote:
You could try a long charge with a high voltage DC source, like an
ancient unregulated battery charger - or a bench PS set to about 30
volts. But make sure the bench one has current regulation as if the
battery does recover, it will try to draw lots of current at this
voltage.

Hmm.. I suppose I could try the 24V setting on trickle charge,
supervised!

If it will actually produce an output to a totally flat battery - many
modern units won't.

--
*Why do overlook and oversee mean opposite things?

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