[OT] Charging UPS batteries outside the UPS

[Drew Van Zandt]

>
>   The datasheet gives "Charge Method (Constant Voltage)" for two
> scenarios:  "Cycle use (Repeating use)" has an initial current of <=
> 2.88 A, and a control voltage of 14.5 to 14.9 V.  "Trickle use" has an
> initial current of <= 1.08 A, and a control voltage of 13.6 to 13.8 V.
>
>   I almost sort-of understand that.  :)  But I don't have the
> knowledge to translate it into "What will happen if I hook it up to an
> automotive charger?"


I would expect an automotive charger to exceed the 2.88A charge current
by possibly quite a bit; it depends very much on the charger.  (I suppose
I'm saying you should RTFM for the charger, if you have one.)  I know some
chargers I've seen have 8A or even higher current ratings.  I would expect
the voltage of a car charger to be in the right ballpark, at least, but
again
that may be in the manual.

Exceeding the 2.88A charge current by a large amount would be a Bad Thing
(TM);
battery damage or even explosions could result.  Do not dispose of in fire,
do
not bend, fold, spindle or mutilate, no user servicable parts inside.  Do
not eat.
Do not hit towards human or animal.  Not a toy, keep out of reach of
children.
Not for use in medical or lifesaving equipment, may contain small parts.
Contains
energy equal to the mass multiplied by the speed of light squared.

--DTVZ
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