This item Ni-MH battery stick, the chemistry is Ni-MH, that is, nickel-metal-hydride, and it's meant to be a replacement for other Ni-MH batteries. A battery stick is similar to a battery pack, in that it is actually multiple batteries bundled.This 3.6 volt Ni-MH battery is 3-cells in a stick.
This item Ni-CD battery stick. A battery stick is similar to a battery pack, in that it is actually multiple batteries bundled.This 3.6 volt Ni-CD battery is 3-cells in a stick.