Re: Dry dead battery

terryS wrote:
On Jun 30, 7:28 pm, John Fields <jfie...@xxxxxxxxxxxxxxxxxxxxx> wrote:

On Mon, 30 Jun 2008 14:01:56 -0700 (PDT), rabiticide

<rabitic...@xxxxxxxxx> wrote:

I was charging my battery over the weekend and checked it last night
to find the battery dead as a doornail. Upon examination, the battery
is completely dry. I'm guessing it was overcharged and the water
boiled away but it shouldn't've 'cause it's an "automatic battery
charger" that's designed to stop charging when it's done...

So, do I just add distilled H2O? Will that work? I have to walk to the
store 1.5 miles (2.5 km) away and that's a long way to carry 1 gallon
(4? L) of water...

---
I'd just use tap water...

JF


Depends on the tap (or well!) water.
Wells and some mains water here can have some iron salts in it which
can be deadly for lead acid batteries.
Sounds like it 'boiled dry'! You may, by adding water, get some
capacity back but I wouldn't guarantee it.
Too many amps for too long a time, maybe?
Someone more expert could comment on this; but isn'tan automatic
charger supposed to stop when the battery potential has risen above a
certain value, maybe for a certain period of time. If the battery is
dry ............... ergo no potential!
Therefore no automaticity?

Suppose a cell was shorted - battery V wouldn't rise high
enough for the automatic charger to shut off.

Ed
.

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