What is a 3.7 volt 18650 battery used for?
18650/1865 cells are used in many laptop computer batteries, cordless power tools, many electric cars, electric scooters, most e-bikes, older portable powerbanks, electronic cigarettes, portable fans, and LED flashlights. Nominal voltage is 3.6-3.7 V.

1500mah 3.7v Rechargeable Battery
Factory Rechargeable 18650 Battery Cell 3.7V 1800mAh 6.66wh Lithium Battery with PCB and Cap for Massage Gun Battery.

3.7V 2000mAh 18650 Li-ion Pack for Solar Garden
Li-lon Battey 18650 3.7V 2200mAh Lithium Ion Battery Cells
18650 Li-ion 2500mAh Rechargeable Battery Copy
18650 3.7V 2600mAh Li-Ion Cell
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