Re: AA Battery capacity tester- resistor & clock


"Jim Elbrecht"

I've got a couple dozen Nimh batteries that are starting to show signs
of age. [some are 7yr old 800mAh, the newest are 2000 mAh & 3-4 yrs
old]

I googled for capacity testers and found a post that said to wire a 1
ohm resistor in series with a aa battery operated clock.


** Not wired in "series" in PARALLEL !!


Set the clock to 12, insert battery, wait until clock stops.


** Neat idea.


I have a box of clock parts so I set up a 4-battery tester and set it
in motion yesterday with some of the 2000 mAh batteries.


** So four separate clocks ?

However, for testing non rechargeable cells like AA alkalines - use a 10
to 15 ohm resistor.

Shame they will be buggered at the end of the test !



....... Phil


.

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