In article ,
Matthew Ames wrote:
Just put an amp meter inline with the battery and it appears to be
charging at about 100ma

Right. Sub C cells are usually between about 1500 and 2500 mAh capacity,
and the safe basic charge rate is 1/10th of the capacity for 14 hours. So
100mA sounds rather low - unless the system is old when batteries *may*
have had a lower capacity than today. Also, you said earlier the charger
was marked as 0.6 amp which seems a bit generous if it's only charging at
100mA.

However, if things aren't overheating etc, I'd leave it on overnight and
check the current again in the morning.

I'd be willing to bet though that it's simply the battery that's
knackered.

--
*Virtual reality is its own reward *

Dave Plowman London SW 12
RIP Acorn