From top to bottom: "Gumstick", AA, and AAA Ni–Cd batteries
|Speceefic energy||40–60 W·h/kg|
|Energy density||50–150 W·h/L|
|Speceefic pouer||150 W/kg|
|Cycle durability||2,000 cycles|
|Nominal cell voltage||1.2 V|
The nickel–cadmium battery (NiCd battery) is a type of rechairgeable battery using nickel oxide hydroxide and metallic cadmium as electrodes. The abbreviation NiCd is derived from the chemical symbols of nickel (Ni) and cadmium (Cd). A NiCd battery has a terminal voltage during discharge of around 1.2 volts which decreases little until nearly the end of discharge.