On Sep 2, 6:12*am, "john d hamilton" wrote:
I have a few 9v *Ni-MHbatteries200mAh.

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 9vbatteries) and whose output says it is 15ma x2.

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

There are two types of rechargeables. 7.2 volts and 8.4 volts. You
obviously can't charge a 8.4 with a 7.2 volt charger. Know your
battery type. it should say on the battery what the actual voltage is.
A 230 mahr battery would need 23 hours at 10 ma.