[mackay maus]

Hello all;
I have a Sony charger (BC-7DC) to charge the NC-6WM gum pack battery. Can I charge the equivalent NH battery in this charger, or does this battery require a special charger?

Found some NH at a good price, but had hoped not to buy another charger.

thanks everyone!

Matthew

 

[Braver]

I tried charging some NiHM's with a NiCD charger. they didn't seem to get fully charged or something, they lasted a lot shorter.

 

[mariowar]

Most of electric chargers have an internal timer............and the charging time of the Nimh is a little bit longer than the Nicd...........

 

[lini]

Generally you can, but usually it's not optimal - and sometimes it's even dangerous. As mariowar already mentioned, many chargers use an internal timer. Better models use a chip that controls voltage and current over time (and maybe even compares this to a stored curve) - loading will be stopped, when delta-I or delta-V are small enough, then. So if the charger only has the minimum-deltas or the curve for NiCad stored, you won't get optimal results with NiMH. In adddition, if the internal resistance of the NiMH cell is considerably lower than that of the original NiCad cell, you could destroy the charger because of too much current, if it's a bad design. Or the NiMH cell could get very hot and might explode, if there's no appropriate current limiter. So I'd recommend to check the temperature at least, if you try that.

Greetings from Munich!

Manfred / lini