Nickel-hydrogen battery is the abbreviation of metal hydride nickel battery, which is mainly composed of hydrogen ion and metal nickel. Ni-MH batteries have 30% more power reserve than Ni-Cd batteries, lighter than Ni-Cd batteries, and have a longer service life. The disadvantage of nickel-metal hydride batteries is that they are much more expensive than nickel-cadmium batteries, and their performance is worse than that of lithium-ion batteries. In daily life, nickel-hydrogen batteries are mainly used in toys, photographic equipment, and various electronic equipment. Some large-scale nickel-hydrogen batteries have begun to be used in electric vehicles and construction machinery. It can be said that nickel-hydrogen batteries are currently in addition to lithium. The highest utilization rate besides ion battery is also the most environmentally friendly reusable battery.

It is not that the larger the capacity, the better. Consumers should choose the battery capacity based on the capacity of the battery. For example, it is best to choose a battery with a larger capacity when it is used in photographic equipment, electric toys and other appliances that require large current output. When used in ordinary radios, walkmans, various remote controls and other appliances that require less output current, you can choose a nickel-metal hydride battery with a smaller capacity.

Pay attention to the battery's performance-price ratio, and don't blindly believe in foreign brands. In fact, many domestic brand-name batteries have higher performance-price ratios than similar foreign products.

Pay attention to the shelf life of the battery. Due to the self-discharge of Ni-MH batteries, the shelf life of nickel-hydrogen batteries is generally about 9 to 12 months. Consumers should pay attention to buying recently produced Ni-MH batteries as much as possible.


The polarity must not be reversed. The correct connection method is to connect the + mark on the battery to the + mark on the electrical appliance, and the negative-mark on the battery to the-mark on the electrical appliance.

The battery is strictly prohibited from short-circuiting, and it is not allowed to directly connect the positive and negative terminals of the battery with wires or metals.

It should be observed at any time during use. Once the battery leaks, swelling and deformation and other undesirable defects occur, it must be removed in time to avoid damage to the electrical appliances.

Due to the memory characteristics of the Ni-MH battery, the battery should be used up before charging. The charging time should not be too long. Take out the battery as soon as the charger prompts that the battery is fully charged.

Avoid long-term storage, because the battery itself has self-discharge, so if the battery is not used for a long time, the battery should be used up and then recharged, and then stored after it is fully charged.

To learn more about Li-ion batteries, please refer to