AA nimh voltages after charging.

[abvidledUK]

Using Sony charger, BCG-34HC, and Sony AA 2,000 mah nimh batteries.

Off load volts measured on 2 DMM's.

1.48v immediately after led extinguished on charger.

1.45v a day after charging

1.38v a month after charging

1.27v two months after charging.

I leave my nimh's in the charger for an hour or so after charging light goes out.

I date my 4 packs of nimh's when charged.

I noted the above voltages, and was surprised to see how well they kept the initial charging voltage.

It is also pretty much the same for my other makes of nimh's.

I have been using this setup for a couple of years now, with no ill effects, the nimh's are still as good capacity as new, as are the other makes I charge in this charger.


What is your experience ?

 

[wptski]

How do cells measure right after you remove them? After a day, 1.45V is very good! I really don't watch that close but I don't think that I have any cells other than LSD cells that hold up that well. I'll have to look at the Ni-MH ShootOut to see if they were tested by SilverFox(Tom).

 

[abvidledUK]

Thanks, volts immediately after charging will be added as per your suggestion.

I'm just charging some up now.

Reading, just off charger, after led extinguished = 1.48v

 

[wptski]

Deleted!

 

[eebowler]

WOW! I'm cycling some new cells now and fresh off the charger they range from 1.39V-1.41V. A day later, they are almost all 1.34V and some are 1.35V (and this is a new charger I bought.)

My maha 204F charger (3 years old) charged to 1.41V in one bay and 1.39V in the other. Again a day later, voltage drops to 1.35-1.36V.

I don't need a new charger, I don't need a new charger... NO I don't. :thinking:

 

[mdocod]

Most of my cells come off the charger at ~1.45V, and drop to ~1.39 by the next day, steady decline over a month or more so to drop below 1.3..

cept for my energizer cells, which are dead in a week every time.

 

[eluminator]

1.48v immediately after led extinguished on charger.

1.45v a day after charging

1.38v a month after charging

1.27v two months after charging.

That seems strange to me. I think my cells drop down to around 1.3 volts in a few days. The eneloops drop slower. At this voltage, they have nearly all of their charge.

Then the decline is much slower. When my cells get to 1.27 volts, they only have approximately 30 to 40 % of their charge left.