Having a fairly mixed boxfull of NiMH AA cells, acquired over the years,
I find that some of them aren't holding full charge, which is annoying.
I'm looking for a method to quickly and simply load test them to
determine which are good and bad.
Any ideas?

In article ,
Grimly Curmudgeon wrote:
Having a fairly mixed boxfull of NiMH AA cells, acquired over the years,
I find that some of them aren't holding full charge, which is annoying.
I'm looking for a method to quickly and simply load test them to
determine which are good and bad.
Any ideas?

Charge them then discharge via a resistor noting time taken to reach say
0.8 volts?

--
*I'd kill for a Nobel Peace Prize *

Dave Plowman London SW
To e-mail, change noise into sound.

On Jun 14, 4:22*pm, Grimly Curmudgeon
wrote:
Having a fairly mixed boxfull of NiMH AA cells, acquired over the years,
I find that some of them aren't holding full charge, which is annoying.
I'm looking for a method to quickly and simply load test them to
determine which are good and bad.
Any ideas?

Charge them and test each ones voltage, the older they get the less
they hold, i used to do this for Nicads just after they got off a
charger, for an auto charger i would think you want to measure them at
the same time after the charge stops, try it and see.

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember "Dave Plowman (News)"
saying something like:

Charge them then discharge via a resistor noting time taken to reach say
0.8 volts?

Ahah. I've found a page that describes how to do just that. I saw some
of the cheapy battery meters on ebay, but thought they were nothing more
than simple voltmeters.
http://www.candlepowerforums.com/vb/...66#post2820266

We were somewhere around Barstow, on the edge of the desert, when the
drugs began to take hold. I remember ransley
saying something like:

Charge them and test each ones voltage, the older they get the less
they hold, i used to do this for Nicads just after they got off a
charger, for an auto charger i would think you want to measure them at
the same time after the charge stops, try it and see.

There have been some weird voltages, all over the place, when they come
off charge. Some up to 1.85V, but mostly around 1.65 or so.
The so-called 'smart' charger gets them hot enough to not be able to
pick them up, so I've given up using that. I've several dumb but kinder
slow chargers, so will use them instead.