also: ニッケルすいそバッテリ
noun
nickel metal hydride battery
A rechargeable battery technology using a nickel hydroxide positive electrode and a hydrogen-absorbing alloy negative electrode. Common in hybrid vehicles and consumer electronics.
このハイブリッド車にはニッケル水素バッテリーが搭載されている。
This hybrid vehicle is equipped with a nickel metal hydride battery.
Lithium-ion batteries have higher energy density and are more common in modern portable electronics, while nickel metal hydride batteries are often used in hybrid vehicles and are more tolerant of overcharging.
From English 'nickel metal hydride battery', adapted into Japanese as ニッケル水素バッテリー.