The nickel-metal hydride battery should pay attention to maintenance when using it.

Ni-MH battery is a kind of battery with good performance. Ni-MH batteries are divided into high-voltage Ni-MH batteries and low-voltage Ni-MH batteries. The positive active material of nickel-hydrogen battery is Ni(OH)2 (called NiO electrode), the negative active material is metal hydride, also called hydrogen storage alloy (electrode is called hydrogen storage electrode), and the electrolyte is 6mol/L potassium hydroxide solution. As an important direction of hydrogen energy application, nickel-metal hydride batteries have attracted more and more attention.
(1) Avoid overcharging during use. Within the cycle life, overcharging should be avoided during use, because overcharging will easily cause the positive and negative electrodes to expand, causing the active material to fall off and the diaphragm to be damaged, the conductive network to be damaged, and the ohmic polarization of the battery to increase.
(2) Prevent the electrolyte from deteriorating. During the cycle life of the NiMH battery, hydrogen evolution of the battery should be suppressed.

(3) Storage of NiMH batteries. The nickel-metal hydride battery should be stored after being fully charged. If the battery is stored for a long time without storing electric energy in the battery, the function of the hydrogen storage alloy of the negative electrode of the battery will be weakened, and the battery life will be shortened.