if the battery is old and already on its way to death,
draining it completely will only hasten the way.
but if the battery is still 'healthy', draining it completely,
re-charging it will restore it to its near-original state of ill-health before it got drained.
i once left the domelight of my city car, on, over the weekend.
my 3 year old battery died, and refused to be revived. had to replace it.
my slex car's alternator bearing died, and the 4 year old battery ran flat.
the bearing was replaced, we push-started the car, and a year later, the battery still runs good.
errr,
motolites po.
heh heh.
Last edited by dr. d; January 29th, 2022 at 11:36 AM.