A 3.7V lithium battery is a type of lithium battery with a nominal voltage of 3.7V and a full charge voltage of 4.2V. Its capacity ranges from a few hundred to several thousand milliampere hours. Generally applied to various instruments, testing instruments, medical instruments, POS machines, laptops and other products.

　　1> Divided by appearance:

　　Cylindrical 3.7V lithium batteries, such as 32650, 26650, 18650, 14650, etc;

　　Square 3.7V lithium batteries, such as 103450, 523450, 653450, etc;

　　2> Divided by capacity:

　　1800mAh, 2200mAh, 2600mAh, 4400mAh, 6600mAh, etc., where 4400mAh and 6600mAh are the combined capacities.

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