18650 Battery
The 18650 battery is a very common type of rechargeable lithium-ion battery, named after its dimensions - 18 mm in diameter and 65 mm in length (in fact, due to the bulge at the top, the total length is closer to 67 mm). This type of battery is widely used in many industries, including laptops, power tools, lamps, electronic cigarettes, and even early versions of electric cars, due to its high energy density, long life, and relatively low cost.

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PRODUCT DESCRIPTION


18650 Battery

The cylindrical lithium batteries include lithium iron phosphate, lithium cobalt, lithium manganese, mixed cobalt manganese, and ternary material systems. The shell is divided into a steel shell and a polymer shell, which have different advantages.

The 18650 battery is a very common type of rechargeable lithium-ion battery, named after its dimensions - 18 mm in diameter and 65 mm in length (in fact, due to the bulge at the top, the total length is closer to 67 mm). This type of battery is widely used in many industries, including laptops, power tools, lamps, electronic cigarettes, and even early versions of electric cars, due to its high energy density, long life, and relatively low cost.


Characteristics of 18650 batteries

Ø High energy density: 18650 batteries have a high energy density, which allows them to provide a long period of power supply, making them suitable for devices that require large amounts of energy storage.

Ø Long life: Lithium-ion batteries have a long cycle life, which means they can be recharged multiple times without significant reduction in capacity.

Ø Stability: 18650 batteries are more stable and reliable in performance due to mature manufacturing technology and quality control.

Ø Standardisation: Uniform dimensions make 18650 cells easy to replace and integrate into different product designs.

Ø Cost-effectiveness: Due to the large production volume, the unit cost of 18650 batteries is lower.


Application: 

Widely used in energy storage power station, communication base station, UPS backup power source, solar and wind power generation, electric bus, electric tools, ship, yacht, rail transit, electric motorcycle, golf cart, golf trolley, medical instrument.


18650 Lithium Ion Battery (INR18650-20P)

ItemSpecification
Nominal Capacity2000mAh (0.2C, 2.75V discharge)
Charging Voltage4.2  ±0.05 V
Nominal Voltage3.7V
Charging MethodCC-CV (constant voltage with limited current)
Charging CurrentStandard charge: 1300mA Rapid charge : 2600mA
Max. Charge Current1C
Max. Discharge Current1C/2C
Discharge Cut-off Voltage2.75V
Cell Weight47.0g
Cell Dimension18*65
Operating TemperatureCharge : 0 to 45℃ Discharge: -20 to 60℃
Storage Temperature3 months :-20~45℃(1*)1 month : -20~60℃(1*)

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Development trends

Cylindrical battery technology has advanced in recent years as demand in the electric vehicle and energy storage markets has grown.Cylindrical cells are available in standardised sizes such as 18650, 21700 and 4680, which facilitates the design and manufacture of battery packs. For example, the introduction of the 4680 battery signalled the development of cylindrical batteries towards higher energy density, lower production costs and simpler assembly. In addition, the application of new materials and processes has led to improved performance and safety of cylindrical batteries.


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