In terms of the voltage of each cell battery, NiMH and NiCd are both 1.2V, while the lithium battery is indeed 3.6V, and the voltage of the lithium battery is three times that of the other two. And the weight of the same type of battery lithium battery and nickel cadmium battery is almost equal, and the nickel hydrogen battery is heavier.
It can be seen that the weight of each battery is different, but the lithium battery because of the high voltage of 3.6V, in the case of the output of the same voltage, the number of single battery pack can be reduced by one third, so that the weight and volume of the formed battery is reduced.
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