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Difference Between Ni-MH Battery and Lithium Battery

Aug. 10, 2019

What is the difference between Ni-MH Battery and lithium battery? As a Ni-Cd Battery Pack Supplier, let's explain it to everyone.

First, the weight aspect

In terms of the voltage of each unit cell, nickel-metal hydride and nickel-cadmium are both 1.2V, while lithium batteries are indeed 3.6V, and the voltage of lithium batteries is three times that of the other two. And the weight of the same type of battery lithium battery is almost equal to the nickel-cadmium battery, while the Ni-MH Battery is relatively heavy. It can be seen that the weight of each battery itself is different, but the lithium battery is reduced by 1/3 of the single battery when outputting the same voltage due to the high voltage of 3.6V, so that the weight and volume of the battery after molding are reduced. 

Second, the memory effect

Ni-MH Battery has the same memory effect as nickel-cadmium batteries. Therefore, regular discharge management is also required. This kind of periodic discharge management is handled in a fuzzy state, and some even discharge under the incorrect knowledge (the discharge is different for each discharge or after several uses). This cumbersome discharge management It is unavoidable when using NiMH batteries. Relative lithium batteries are very convenient and simple to use because they have no memory effect at all. It does not have to pay attention to the residual voltage, it can be charged directly, and the charging time can naturally be shortened.

Ni-MH Battery

Ni-MH Battery

Third, the self-discharge rate

Nickel-cadmium batteries are 15 to 30% (months). Ni-MH batteries are 25 to 35% (months), and lithium batteries are 2 to 5% (months). The above nickel-hydrogen battery has the highest self-discharge rate, and the lithium battery has a very low discharge rate compared with the other two types of batteries.

Fourth, charging method

Ni-MH Battery 2200mAh 12V and lithium batteries cannot withstand overcharging. Therefore, in the pICKCUT control mode in which the nickel-hydrogen battery is charged at a constant current, when the charging voltage reaches the maximum, the charging is stopped and the charging mode is the best. Lithium batteries use the constant current and constant voltage methods to charge the best. If the nickel-cadmium battery charger-DV control method is used for charging, the nickel-metal hydride battery and the lithium battery.

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