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The definition rule of 18500 lithium battery is: 18500 battery has a diameter of 18mm and a length of 50mm, and is a cylindrical battery. 18500 lithium battery parameters: voltage: 3.6V (conventional universal battery, used for low-power electronic devices with a maximum discharge of 1C. Discharge conditions can be changed according to the situation); 3.2V (power battery can be customized according to the situation) Charging parameters: 4.2V

The minimum discharge termination voltage is generally 2.75V, and the maximum charge termination voltage is 4.20V; Capacity: 3.6V lithium cobalt oxide with current technology reaching 1900AMH; Diameter: 18 ± 0.2mm

Design scheme for the 7.4V 1400mAh 18500 lithium battery pack of JuDa Lithium Battery:

Battery model: 18500-2S1P/1500mAh/7.4V

Nominal voltage: 7.4V

Nominal capacity: 1500mAh (discharged from 0.2C to 5.5V)

Factory voltage: 7.2V~7.8V

Product size: MAX51 × 37 × 20mm

Finished product internal resistance: ≤ 250m Ω

Output mode: UL100724 # red (P+), UL100724 # black (P -)

Execution standard: GB/T18287-2000

Shelf life: 12 months

Working temperature: 0~45 ℃ (charging), -20~60 ℃ (discharging)

Battery charging: Charging limit voltage: 8.4V Charging current: 750mA (standard), 1500mA (maximum)

Battery discharge: Discharge cut-off voltage: 5.5V Discharge current: 300mA (standard), 1500mA (maximum)

Selection of 18500 battery charger:

Standard charging: The battery is first charged at a constant current of 0.5C5A (1.5A) to 4.2V. As the charging current gradually decreases, it is then charged at a constant voltage of 4.2V until the current decreases to 0.01C5A. The charging time is approximately 3 hours. Rechargeable batteries should not have permanent damage within 0-45 ℃.

Standard discharge: After a fully charged 18500 battery is left at an ambient temperature of 20 ± 5 ℃ for 30 minutes, it is discharged at a constant current of 0.2C5A to 6.0V for approximately 5 hours. Therefore, it is suitable to choose a 4.2V/1A lithium battery charger.

18500 battery usage:

18500 batteries are widely used in cylindrical lithium batteries in electronic fields such as electronic cigarettes, toys, security, power banks, digital products, and cars.

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