Product Information

18500-1400mAh Lithium-ion Battery Main Technical Specifications

I. Basic Electrical Parameters
Nominal Capacity: 1400mAh (minimum capacity is the same). Test condition: Discharge at 0.2C constant current down to 2.75V
Nominal Voltage: 3.7V
Charge Cut-off Voltage: 4.2V±0.03V; Maximum voltage limit: 4.3V
Discharge Cut-off Voltage: 2.75V
Charging Mode: Constant Current - Constant Voltage (CC-CV)
Standard Charging Current: 700mA (0.5C), applicable temperature: 0~45℃
Maximum Continuous Charging Current: 1400mA (1.0C)
Maximum Continuous Discharging Current: 2.8A (2.0C)
Internal Resistance: ≤60mΩ (measured by 1KHz AC method)

Storage / Delivery Voltage: 3.85~3.95V (State of Charge: 50%~60%)

II. Environmental & Physical Parameters
Operating Temperature
Charging: 0 ~ 45℃
Discharging: -20 ~ 60℃
Storage Temperature
Within 1 month: -20 ~ 45℃
Within 6 months: -20 ~ 35℃
Overall Dimensions: Diameter 18.5mm, Length 50mm
Cell Weight: Approx. 32.0g

Configuration: Without protection circuit board

III. Charge-Discharge & Cycle Performance
(Standard environment: 20±5℃, Humidity: 60±15%)
Normal Discharge Capacity: ≥1400mAh (discharge at 280mA down to 2.75V)
2C Rate Discharge Capacity: ≥1330mAh (95% of initial capacity)
Cycle Life (at 25℃): ≥300 cycles (End-of-life criterion: capacity drops to 80% of initial capacity)
Charge Retention: After fully charged and stored for 28 days, remaining capacity ≥95%
High-temperature Performance (Stored at 60±2℃ for 3 hours): Discharge capacity ≥98%

Low-temperature Performance (Stored at -10±2℃ for 16~24 hours): Discharge capacity ≥70%

IV. Safety Performance
The battery has passed nine safety tests including overcharge, overdischarge, short circuit, thermal shock, heavy impact, vibration, nail penetration, 1-meter drop and compression.

Test criteria: No explosion, no fire and no electrolyte leakage.

V. Storage & Warranty
Long-term Storage: Store in dry and cool place, keep the voltage at 3.85~3.95V
Warranty Period: 6 months after factory delivery (Return and exchange available only for original manufacturing defects)
Environmental Compliance: Compliant with RoHS standard

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