What is a 3.7V lithium battery?

1.What is a 3.7V lithium battery?

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, with capacities ranging from a few hundred to several thousand milliampere-hours (mAh). It is commonly used in various instruments, detectors, medical devices, POS machines, laptops, and other products.

2.Classification of 3.7V lithium batteries:

(1) Based on shape:

• Cylindrical 3.7V lithium batteries, such as 32650, 26650, 18650, 14650, etc.
• Square 3.7V lithium batteries, such as 103450, 523450, 653450, etc.

(2) Based on capacity:

• 850mAh,1800mAh, 2200mAh, 2600mAh, 4400mAh, 6000mAh, 6600mAh, etc., where 4400mAh and 6600mAh are combined capacities.

3.Capacity of 3.7V lithium batteries:

The capacity of a 3.7V lithium battery increases with the size of the individual battery or the number of batteries connected in parallel, according to the electrical formula: I_total = I1 + I2 + I3 + … + In.

4.Applications of 3.7V lithium batteries:

Single 3.7V lithium batteries, when properly assembled, can be combined into battery packs with different voltages and capacities. Based on these advantages, lithium batteries are widely used in:

Communication equipment: communication base stations, handheld route testers, portable communication test sets, individual communication devices, portable radios, etc.
Medical instruments: monitors, electrocardiographs, portable ultrasound machines, ventilators, infusion pumps, dental curing lights, etc.
Industrial instruments: water quality analyzers, soil testers, laser pointers, brake testers, ground-penetrating radars, military searchlights, etc.
Power tools: handheld drills, electric scooters, golf carts, etc.
Consumer electronics: smart vacuum cleaners, handheld data collectors, financial POS machines, digital products, etc.