In article ,
john d hamilton wrote:
I have a few 9v Ni-MH batteries 200mAh.

I have two chargers one with output at 9v of 10ma and the other a very
old one that says output is 7.2v (even though its designed to take two
9v batteries) and whose output says it is 15ma x2.

Is that really 7.2 or 8.2v? Many rechargeables are 8.2v nominal rather
than 9 volts. You can't actually do an exact 9 volt nominal as the cell
voltage is 1.2 - as opposed to 1.5 for dry cells.

Which would be the best to use on the 9v Ni-MH and what would be roughly
be the minimum charge time to ensure batteries are fully charged
please? thanks for advice.

You need a custom NiMH charger for best results - one designed for Ni-Cad
won't work properly. Many newer ones do both.

FWIW the important thing is not to wreck the battery with a poor charger -
far more important than fully charging one if you require a decent life
from it.

--
*Two wrongs are only the beginning *

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