Re: APC Batteries.

["Andy Whitfield" <andywhitfield2002@xxxxxxxxxxx>]

I think I know why the 700va UPS wouldn't charge the batteries.
The UPS will limit its charging current, so when the batteries try
to take more current, it will reduce the charging voltage.
I'm guessing the big batteries pulled the UPS voltage down so far,
it thought the batteries were defective/short circuit.
You could try switching the 700va UPS off at the front but still
plugged in.  This may well charge the batteries.  Then turn the UPS
on after an hour or so.
Andy

--- In ukha_d@xxxxxxx, "domdevitto" <dom@...> wrote:
> > --- In ukha_d@xxxxxxx, "domdevitto" <dom@> wrote:
> > > Nope,
> > > I use a car charger to bring the batts to 100%, connected
them
to
> > the
> > > UPS and immediately after the first full 'to switchoff' use,
> > neither
> > > the UPS, nor a car charger could bring the batts back to
life :-(
> >
> > I would think the batteries had failed for other reasons.
> > I've had a car parked up where the battery was really flat - far
> > more than a UPS would let a battery go to.  Yet that charged up
ok.
> > Sometimes using a regulated bench PSU is better than a car
charger
> > or UPS.  Though you need to know what you're doing.
>
> Yeah - seemed very odd to me too :-( Maybe I'll gentle trickle them
> with a bench PSU, but I think I'll just keep with my 3000va unless
> some storms hit.