I just bought an OFNA DC Pro Charger and I've charged 2 packs with it and they both got very hot before the charge finished. The first pack I caught as it was getting ready to finish and noticed how hot it was so I stopped it a little short. The second finished and was very hot, at least to me.

I was charging 3300mAh NiMH packs at 5.0 amps.

Am I doing something wrong? Should the packs be so hot when they finish charging?

I've read of a temperature sensor for the pack. Is this necessary?

Anyone else have this charger? Anyone one else use the temperature sensor?

Thanks, Mike