My Motor Drive MA Ni-Cd battery pack is no longer functional. Bad batteries, I'm sure. I've been looking around for replacements, but am having trouble finding them. I'm pretty sure they are 1.2V cells (a total of 12 in the pack) and they are soldered in series. The batteries have a slightly smaller diameter than AA batteries, but only 1-1/8" long (including the + pole). Does anyone know of a US supplier of such batteries? I think I'd prefer NiMH instead of Ni-Cd if they're available and if the charger would be compatible.