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What is the difference between various common rechargeable batteries?

22 July 2021

Kingbo Power Technology

What is the difference between various common rechargeable batteries

At present, nickel-cadmium, nickel-metal hydride, and lithium-ion rechargeable batteries are widely used in various portable electrical equipment (such as notebook computers, cameras, mobile phones, consumer electronics, personal care products, medical devices and etc. ). Each rechargeable battery has its own unique chemical properties. The main difference between nickel-cadmium and nickel-metal hydride batteries is that the energy density of nickel-metal hydride batteries are relatively high. Compared with batteries of the same type, the capacity of Ni-MH batteries is twice that of Ni-Cd batteries. This means that the use of nickel-metal hydride batteries can greatly extend the working time of the equipment when no additional weight is added to the electrical equipment. Another advantage of the Ni-MH battery is A.


When choosing a charger, it is best to use a charger with correct charging termination devices (such as anti-overcharge time devices, the negative voltage difference (-dV) cut-off charging and anti-overheating induction devices) to avoid shortening the battery life due to overcharging. Generally speaking, slow charging can prolong the service life of the battery better than fast charging.


a. The depth of discharge is the main factor affecting battery life. The higher the depth of discharge, the shorter the battery life. In other words, as long as the depth of discharge is reduced, the service life of the battery can be greatly extended. Therefore, we should avoid over-discharging the battery to a very low voltage.

b. When the battery is discharged at a high temperature, the service life of the battery will be shortened.

c. If the designed electronic equipment cannot completely stop all current, if the equipment is left unused for a long time without taking out the battery, the residual current will sometimes cause the battery to be excessively consumed, causing the battery to over-discharge.

d. When using batteries with different capacities, chemical structures, or different charge levels, as well as batteries of different old and new types, the batteries will discharge too much, and even cause reverse polarity charging.


If the battery is stored at a high temperature for a long time, its electrode activity will be attenuated and its service life will be shortened

Greatly reduce the "memory effect" problem that exists in cadmium batteries, so that nickel-metal hydride batteries can be used more conveniently. Ni-MH batteries are more environmentally friendly than Ni-Cd batteries because there are no toxic heavy metal elements inside. Li-ion has also quickly become a standard power source for portable devices. Li-ion can provide the same energy as Ni-MH batteries but can be reduced by about 35% in terms of weight. This is good for electrical equipment such as cameras and laptops. It is crucial. The advantage that Li-ion has no "memory effect" and no toxic substances are also important factors that make it a standard power source.

The discharge efficiency of Ni-MH batteries will decrease significantly at low temperatures. Generally, the charging efficiency will increase with the increase in temperature. However, when the temperature rises above 45°C, the performance of rechargeable battery materials at high temperatures will degrade and the cycle life of the battery will also be greatly shortened.

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What is the difference between various common rechargeable batteries?