Demhi Moss wrote:
How do I know when common batteries are at "End Of Useful Life?"
I guess the obvious answer is "They don't run the item in question."
If the batter doesn't run on say a saw I know it can be moved to
something like a remote control and still give some useful life. But
when I use my meter on it and it is less then 1 Volt I toss them. When
it gives a reading of 1.4 volts or
So, besides the anwer "When they stop working!" when do you toss out
your batteries??
thanks
Roy
The shape of the discharge curve, gives you some idea.
http://www.powerstream.com/AA-tests.htm
The output impedance of a battery goes up, near
end of life. Which is why some alkaline batteries had
the "test strip" affixed to the side of the battery,
as a kind of test load for verifying remaining battery
life.
Using your metering method gives you some hint too.
With Duracell alkaline, you don't take chances on harvesting the
last amp-hour from them, because the batteries *leak*. If a Duracell
no longer "ran your saw", you would not put the Duracell at
that point into your "remote control". Because it would leak
in there. And cleaning up the contacts isn't always successful,
if there is severe corrosion.
Paul
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