🚀 go-pugleaf

jasee wrote:
> Graham W wrote:
>> "Paul Hopwood" <paul@hopwood.org.uk> wrote in message
>> news:4bfkc0tp79ta5cir8nvtjas5hejp6961md@4ax.com...
>>> "Graham W" <graham@his.com.puter.INVALID> wrote:
>>>> It would be worth checking the terminal voltage under charging
>>>> conditions to make sure that the death of its predecessor wasn't
>>>> down to over-charging. 13.8V is often quoted as suitable for
>>>> sealed lead-acid batteries.
>>>
>>> According to the PowerChute software the UPS itself reports the
>>> voltage at 13.85V.
>> If on the other hand, the voltage was 14.2V there would be a
>> suspicion
>> of batterycide (is that a word?   8�), which would shortly be
>> followed the demise of the new replacement.
>
> I'm not sure about this, provided the maximum current isn't succeeded
> then I don't think there is a problem, for instance I've often
> revived sealed lead acid batteries by putting the voltage up (with a
> variable supply) until it starts drawing current then reduced it as
> it rises to about a tenth of its rated current. This can revive dead
> batteries. Sometimes I have to wack the voltage up to 20 volts or
> more, before the current increases. I think overheating (which is
> fatal) is caused by too great a current (when charging).

You are not following the discussion!  If you take a new battery and
impose 14.2V across it (because of a faulty control unit), it will draw
a lot of current and drive off the electrolyte.

What we are not discussing is abusing *OLD* useless batteries
to try and recover some useful service from them.


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