2500mAh 18650 Battery 3.7V

  • Long Life Span – Delivers 500 cycles at 8C rate while retaining over 80% of original capacity.
  • Rapid Charge Capability – Supports continuous 4C charging for fast and efficient energy replenishment.
  • Strong Discharge Output – Handles steady 15C discharge, ideal for high-power demand environments.
  • Cold-Weather Performance – Reliable operation at -20℃ with 20A discharge, perfect for extremely low-temperature conditions.
  • Vibration Resistant – Built to perform in tough, high-impact scenarios with excellent anti-shock characteristics.
  • Perfect For – Widely used in garden tools, power tools, and other high-drain equipment.

Specifications

Item Specification
Model INR18650-25P
Normal Capacity 2500mAh @0.2C
Minimum Capacity 2400mAh @0.2C (Discharge the cell from 4.2V to 2.50V by 0.2C current)
Internal Resistance ≤18 mΩ (ACIR)
Normal Voltage 3.7V
Charge Voltage 4.2V
Discharge Ending Voltage 2.5V
Standard Charge Current 0.5C
Standard Charge Cutoff Current 0.02C
Standard Discharge Current 20A
Max Charge Current (Continuous) 25A (50℃>T≥40℃), 4A (40>T≥15℃), 0.5A (15℃>T≥0℃)
Max Discharge Current (Continuous) 20A(60℃>T≥20℃), 15A (20℃>T≥0℃), 10A (0℃>T≥-10℃)
Cell Dimension D:18.25 mm±0.20 mm
H: 64.95 mm±0.20 mm
Weight ≤47g
Operating Temperature (Surface Temperature) Charge: 0 to 50°C Discharge: -20 to 80°C
Storage Temperature 1 year: -20~25℃ ≤70%RH
3 months: -20~45℃ ≤70%RH
1 month: -20~60℃ ≤70%RH

Temperature Dependence of Discharge Capacity

The capacity comparison under different temperatures was tested: After standard charging, the battery was discharged at a constant current of 10A until the cutoff voltage of 2.5V. The obtained capacity data are shown below.

Discharge Temperature
-10℃ 0℃ 25℃ 60℃
≥60% ≥80% 100% ≥95%

Discharge Rate Capabilities

Discharge capacity is measured with the various currents in under table and 2.5V cutoff after the Standard charge at 25±2°C.

Current 0.5A 5A 10A 15A 20A
Relative Capacity 100% ≥95% ≥95% ≥95% ≥95%

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