" Tuuk" wrote in message
...

snip

These batteries measure all 1.38 volts when charged pretty consistantly
and 1.17v when depleted, other than that I cannot measure the efficiency
of the charger to predict time of charge, according to the manufacture it
should be 9.9 hours, according to the math 3000mha devided by 360 ma of
the unit says 8.3 hours to charge full capacity.

Math always works but it won't give you a good answer if you use bad
numbers.

Here's what I mean: Yes, 360 mA times 8.3 hours equals approximately 3000
mAh but you have overlooked a widely-acknowledged rule for recharging:

Charge at 0.1C for about 16 hours, where "C" is the nominal capacity. Using
that rule, you charge a 3000 mA-h cell at 300 mA for 16 hours. (A battery
maker may impose or recommend something else. I'm parroting what I have
picked up.)

Not all the energy is stored by chemical conversion. Some is lost as heat,
which explains why you need to run the charger longer than you calculated.
(9.9 hours gets you closer but I bet they want to stop short of a maximum
charge to avoid having the cells vent.)

Some support for my views, plus helpful advice he
http://www.powerstream.com/NiMH.htm

"Sal"