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18650

18650 3C Li-ion Rechargeable Battery: 3.7V 3500mAh

18650 3C Li-ion Rechargeable Battery: 3.7V 3500mAh
18650 3C Li-ion Rechargeable Battery: 3.7V 3500mAh

18650 3C Li-ion Rechargeable Battery: 3.7V 3500mAh

Description

What is an 18650 Battery?


The 18650 battery is a lithium-ion rechargeable battery originally developed by Sony Corporation in Japan. The name "18650" refers to the battery's dimensions: 18mm in diameter and 65mm in length, with the "0" indicating that it is a cylindrical cell. Due to its excellent performance and versatility, the 18650 battery has become one of the most widely used types in the battery industry today.

  1. Main Features


  • High Energy Density: 18650 batteries offer a high energy density, allowing them to store a large amount of energy in a relatively small size.


  • Long Lifespan: With proper usage and maintenance, 18650 batteries have an extended cycle life, supporting numerous charge and discharge cycles.


  • Safety: With advancements in technology, the safety features of 18650 batteries have greatly improved. These include overcharge protection,

  • over-discharge protection, and short-circuit protection.


  • Wide Applications: Thanks to their superior performance, 18650 batteries are commonly used in a variety of electronic devices, such as flashlights, laptops, and electric vehicles


  • Voltage: The nominal voltage of an 18650 lithium-ion battery is typically 3.7V, and it can reach up to 4.2V when fully charged.


  • Capacity: The capacity of a standard 18650 lithium battery ranges from approximately 1500mAh to 3500mAh, depending on the brand and model.


  • Charging Time: 18650 lithium batteries generally require 2 to 3 hours to fully charge, depending on the charger’s power output and the battery’s capacity.



Item

Condition / NoteSpecification
2.1 EnergyStd.charge / dischargeNominal 3500 mAh
Minimum 3400 mAh
2.2 Nominal VoltageAverage3.635V
2.3 Standard ChargeConstant current0.5C (1700mA) (Refer to 4.1.1)

Constant voltage4.2V

End current(Cut off)50mA
2.4 Max.Charge Voltage
4.2±0.05V
2.5 Max.Charge Current
1.0C(3400mA)
2.6 Standard DischargeConstant current0.2C (680mA) (Refer to 4.1.2)

End voltage(Cut off)2.5V
2.7 Max.Discharge Current
10A
2.8 WeightApprox.Max.49.0 g
2.9 Operating TemperatureCharge0~45℃

Discharge-20~60℃
2.10 Storage Temperature1 month-20~60℃ (for shipping state)

3 month-20~45℃

1 year-20~20℃


Installing the battery into the pack

-. The cell should be inspected visually before battery assembly into the pack.

-. Damaged cell should not be used. (Damaged surface, can-distortion, electrolyte-smell)

-. Different Lot Number cells should not be packaged into the same pack.

-. Different types of cells, or same types but different cell maker’s should not be used together.

 Design of battery pack

-. The battery pack should not be connected easily to any charger other than the dedicated charger.

-. The battery pack has function not to cause external short cut easily.

 

 Charge

-. Charging method is Constant Current-Constant Voltage (CC/CV).

-. Charging should be operating under maximum charge voltage and current which is specified in the product 

specification. (Article. 2.4, 2.5)

-. The battery should be charged under operating temperature specified in the product specification. (Article. 2.9)

 Discharge

-. Discharging method is Constant Current (CC).

(In case of using the battery for mobile equipment, discharging mode could be Constant Power.)

-. Discharging should be operating under maximum discharge current which is specified in the product 

specification. 

-. Discharging should be done by cut off voltage which is specified in the product specification. 

-. The battery should be discharged under operating temperature specified in the product specification. 

 Protection Circuit

-. The protection circuit should be installed in the battery pack, charger.

-. Charger or pack should have voltage sensing system to control over charge or discharge in order to 

maintain the battery’s normal operating mode and protect cell imbalance.

-. Charger or pack should have warning system for over temperature, over voltage and over current


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TEL: 86-18664968482

E-mail: info@eastarco.com sales6@eastarbattery.com

Company add: RM 905,Hongchang Plaza,Shennan Road East, luohu District, Shenzhen

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