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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | Lishen Battery (Suzhou) Co., Ltd. | Model | LR2170LA |
| Cell Type | Rechargeable lithium-ion cell | Form Factor | 21700 cylindrical bare cell |
| Nominal Capacity | 4000mAh | Minimum Capacity | 3800mAh |
| Nominal Voltage | 3.60V at 0.2C | Nominal Energy | Approx. 14.4Wh, calculated |
| Charge Voltage | 4.20V | Discharge Cutoff | 2.50V |
| Capacity Test Charge | 0.8A CC-CV to 4.2V; 80mA cutoff at 25°C | Standard Discharge | 0.8A to 2.5V |
| Detailed Standard Charge | 2A CC-CV to 4.2V; 80mA cutoff | Rapid Charge | 6A CC-CV to 4.2V; 100mA cutoff at 25°C |
| Maximum Continuous Charge | 3A at 0–15°C; 6A above 15°C to 50°C | Maximum Continuous Discharge | 45A with mandatory 80°C cutoff |
| Initial AC Impedance | ≤12mΩ at 1kHz | Dimensions | Diameter 21.2±0.2mm; height 70.5±0.2mm |
| Bare Cell Weight | ≤67g | Operating Temperature | Charge: 0–45°C; discharge: -20–60°C |
| Cell-Surface Temperature | Charge: 0–50°C; discharge: -20–80°C | Cycle Life | ≥60% first-cycle capacity after 300 cycles |
| Cycle Test Conditions | 6A charge; 35A discharge to 2.5V or 80°C cutoff | Shipping State | 20–30% SOC |
The LISHEN LR2170LA is a high-power 21700 lithium-ion cell combining 4000mAh nominal capacity with up to 45A continuous discharge under mandatory thermal protection. It supports a manufacturer-defined 6A rapid-charge condition and provides low initial AC impedance for demanding loads. The cell is intended for professionally engineered battery packs incorporating active voltage, current and temperature protection.
The LR2170LA provides 4000mAh nominal and 3800mAh minimum capacity under its documented capacity test. Combined with a 3.60V nominal voltage, it delivers approximately 14.4Wh per cell and balances useful energy storage with the current capability required by power-oriented 21700 battery systems.
LISHEN specifies a 45A maximum continuous-discharge current with an 80°C cell-surface cutoff. The battery pack must monitor the hottest cell location and interrupt discharge before the thermal limit is exceeded. Suitable conductors, welded connections, cooling and correctly configured overcurrent protection are required for high-load operation.
The rapid-charge method uses 6A constant current followed by constant voltage at 4.20V, ending when current falls to 100mA. Maximum continuous charging is limited to 3A at 0–15°C and 6A above 15°C to 50°C. LISHEN recommends minimizing fast charging when cycle life is the priority.
Initial AC impedance is specified at no more than 12mΩ at 1kHz. The bare cell weighs no more than 67g and measures 21.2±0.2mm in diameter by 70.5±0.2mm in height, supporting compact high-current pack layouts with standardized cylindrical-cell spacing and mechanical retention.
In the manufacturer’s discharge-rate test, capacity at 40A remains at least 90% of the 10A reference result. A separate 0.8A temperature test reports at least 60% relative capacity at -20°C and at least 90% at 60°C after a three-hour temperature stabilization period.
The documented cycle test uses a 6A charge and 35A discharge, with discharge ending at 2.5V or the 80°C cutoff. After 300 cycles, capacity must remain at least 60% of first-cycle capacity. Actual service life depends on current, temperature, cooling, charge strategy and depth of discharge.
Custom battery pack applications: Potential uses include professional power tools, robotic equipment, light electric mobility, portable power systems and other high-current products after application-specific validation. MisenBattery supplies LISHEN cells and supports custom pack integration incorporating a compatible BMS, fuse, welded interconnects, cell-voltage balancing, temperature sensing, insulation, cell spacing, mechanical restraint, cooling and thermal-propagation protection. Supporting CE, UN38.3, RoHS and UL documentation can be provided when available for the applicable product, pack and shipment; the source does not identify certificate numbers. The supplied specification is marked “Lishen Confidential Proprietary,” so publication authorization must be confirmed before its contents are made public.
