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LR2170LA | LISHEN 21700 45A 4000mAh Lithium Battery



Lishen 21700 LR2170LA 45A 4000mAh Flat Top Rechargeable Battery

Product Description:

The Lishen 21700 LR2170LA is a high-performance rechargeable battery designed to meet the demands of today's advanced electronic devices. With its impressive 45A discharge current and 4000mAh capacity, this flat-top battery provides reliable power and long-lasting performance. Ideal for high-drain devices, electric vehicles, power tools, and more, the Lishen 21700 battery is engineered for efficiency and durability.

Key Features:

  • High Capacity: 4000mAh for extended usage times
  • High Discharge Current: 45A continuous discharge for high-drain applications
  • Flat Top Design: Ideal for a variety of devices and applications
  • Rechargeable: Can be recharged multiple times for long-term use
  • Quality Construction: Made by Lishen, a trusted name in battery technology


  • Model: LR2170LA
  • Size: 21700
  • Capacity: 4000mAh
  • Max Continuous Discharge Current: 45A
  • Nominal Voltage: 3.7V
  • Full Charge Voltage: 4.2V
  • Cut-off Voltage: 2.5V
  • Battery Type: Lithium-ion (Li-ion)
  • Top: Flat top
  • Dimensions:
    • Diameter: 21.4mm
    • Length: 70.5mm
  • Weight: Approx. 66g
  • Cycle Life: ≥500 cycles (with 80% capacity retention)
  • Operating Temperature:
    • Charge: 0°C to 45°C
    • Discharge: -20°C to 60°C
  • Storage Temperature: -20°C to 60°C (recommended storage at 20°C ± 5°C)
  • Certifications: CE, RoHS, UN38.3


  • High-drain devices such as power tools, electric vehicles, and portable electronics
  • Flashlights, vapes, and other personal devices
  • Backup power supplies and emergency power sources

Safety Information:

  • Ensure correct polarity when installing
  • Do not short-circuit, puncture, or disassemble the battery
  • Avoid exposure to high temperatures and direct sunlight
  • Use only with compatible chargers and devices


MODEL NUMBER               LR2170SK
Cell Chemical                  NCM
Nominal Voltage               3.65V
Rated Capacity                 5800mAh
Internal Resistance             ≤0.5mΩ
Standard charge and discharge   0.5C/0.5C current
Standard charge and discharge
cut-off voltage
Max.charge and discharge       1.0C/1.0C current(Continuous)
Recommended SOC usage
Discharge operating temperature
Charge operating temperature   0℃~45℃
Storage temperature            -20℃~50℃
Dimensions D×H(mm)       21.7×70.9
Weight(kg)                                        69


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