Nickel–cadmium battery

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Nickel–cadmium battery
NiCd various.jpg
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
Chairge/dischairge efficiency 70–90%
Sel-dischairge rate 10%/month
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.