Edwin Pawlowski wrote:
"Neal" wrote in message


I do have a decent
multimeter , jI'm ust not sure how to go about the diagnostic testing.
Thanks a bunch for any guidance.


Put the lead on to the batter and take a reading. Put the leads on the
charger contacts and take a reading.

If you have a problem doing that, put the meter for sale on eBay.



Now, what I'd recommend doing is to use whatever bits of wire and bent
paperclips are required to put the meter (set on its current mode)in
series with the battery and its charger and see how much current the
charger is delivering to the battery when they're connected that way.

Start out on the highest current range of the multimeter and work your
way down to an on-scale reading.

If the measured charging current is reasonable, say numerically in the
range of 1/4 to 1/10 of the battery's amp hour rating, and you leave it
conected that way for an hour without the battery charging up enough to
make the tool do its thing, then it's the battery's fault.

If you measure zero charging current, then it's likely the charger, or
the battery is completely open circuited, which is highly unlikely.

Jeff

--
Jeffry Wisnia

(W1BSV + Brass Rat '57 EE)

"Truth exists; only falsehood has to be invented."