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18650 VS 21700 BATTERY-DEFINITION, DIFFERENCES, AND APPLICATIONS

浏览次数:1967   更新时间:2022-08-02

Introduction: “18650” and “21700” are both lithium-ion batteries.

Lithium-ion batteries were considered a breakthrough technology as they led to the development of special batteries which could deliver very high current. This led to the design and development of many appliances and tools which high power requirements. Lithium-ion batteries are relatively safe and can be charged quickly. They are used in many appliances we use in our day-to-day life.

There is a raging debate, particularly on the internet, about the pros and cons of the 18650 Lithium-ion battery as against 21700 Lithium-ion battery.

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Differences between 18650 and 21700 Lithium-ion Battery

  • Size: This is the most obvious difference between the 18650 and 21700 Lithium-ion Batteries. Whether this is a factor in choosing between them for applications, is a question which needs to be taken up separately.

    Capacity: The general rule in lithium-ion batteries is a higher capacity for a bigger size. This is not so difficult to understand. However, larger batteries need more time charging time.

Energy:  More energy means more runtime for batteries and this is measured in mAH. 18650 batteries have mAH in the range from 2000 to 3500. 21700 batteries have mAH in the range of 3000 up to 5000 mAh. 

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For our new model AQL29TK, we suggest you use 21700 battery cell, because that’s more cost effective for you. Can do 48V 20AH, bigger capacity for customer!

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For this model AQL29NYH, usually use 18650 cells, the max capacity is 48V 14AH. But when we use 21700 cells,the capacity can do 48V 15AH, more bigger!

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All in all, for the electric bicycle market, the pursuit of large capacity batteries is a trend. From the perspective of cost performance, 21700 has increasingly become the choice of the public.