NiCad

 
Pronunciation: /ˈnʌɪkad/
(also US trademark Nicad)

noun

[usually as modifier]
  • a battery or cell with a nickel anode, a cadmium cathode, and a potassium hydroxide electrolyte. NiCads are used chiefly as a rechargeable power source for portable equipment: NiCad batteries

Origin:

1950s: blend of nickel and cadmium