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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | Misenpower | Model | INR21700-50XG |
| Cell Type | Rechargeable lithium-ion cell | Form Factor | 21700 cylindrical bare cell |
| Nominal Capacity | 5000mAh | Minimum Capacity | 4950mAh |
| Nominal Voltage | 3.6V | Nominal Energy | Approx. 18.0Wh, calculated |
| Charge Voltage | 4.20V | Discharge Cutoff | 2.50V |
| Standard Charge | 2.5A CC-CV to 4.2V; 100mA cutoff | Maximum Charge Current | 15A |
| Continuous Discharge | 40A without temperature cutoff | Temperature-Limited Discharge | 90A with mandatory 75°C cutoff |
| Pulse Discharge | 140A for 3 seconds | AC Internal Impedance | ≤4mΩ at 1kHz, 25±3°C and 30% SOC |
| Dimensions | Diameter ≤21.50mm; height ≤70.50mm | Cell Weight | ≤75.0g |
| Ambient Temperature | Charge: 0–45°C; discharge: -20–60°C | Cell-Surface Temperature | Charge: 0–60°C; discharge: -20–80°C |
| Cycle Life | ≥60% initial capacity after 500 cycles | Cycle Test Conditions | 6A charge; 40A discharge to 2.5V or 75°C cutoff |
| Shipping State | Below 30% SOC; 3.50–3.59V OCV within 90 days | Storage Conditions | 1 year: -20–25°C; humidity ≤60% |
The TENPOWER INR21700-50XG is a high-power 21700 lithium-ion cell combining 5000mAh nominal capacity with 40A continuous discharge without a temperature cutoff. The manufacturer also specifies 90A operation with a mandatory 75°C cutoff and a 140A pulse lasting three seconds. With 15A maximum charging and low AC impedance, it is designed for professionally engineered packs requiring controlled high-current performance.
The cell provides 5000mAh nominal and 4950mAh minimum capacity when tested using a 2.5A CC-CV charge and 1A discharge to 2.5V. At 3.6V nominal voltage, this corresponds to approximately 18.0Wh per cell for energy- and power-focused pack designs.
TENPOWER specifies 40A as the maximum continuous-discharge current without a temperature cutoff. The document additionally permits discharge up to 90A only when pack controls stop operation as the cell reaches 75°C. Current, voltage and temperature monitoring are essential when using either high-current condition.
For brief peak-power requirements, the manufacturer specifies a 140A pulse-discharge current lasting three seconds. This is a time-limited rating rather than a continuous operating current. Pack design must control pulse duration, repetition, voltage sag and cell temperature within validated system limits.
Standard charging uses 2.5A constant current followed by constant voltage at 4.20V, ending at 100mA. A maximum charge current of 15A is specified for faster charging. The charger must monitor voltage, current, time and temperature and must never allow cell voltage to exceed 4.25V.
AC internal impedance is specified at no more than 4mΩ at 1kHz, 25±3°C and 30% SOC. In the manufacturer’s rate test, relative capacity remains 93% at 40A and 92% at 50A. Its -20°C test reports 90% relative capacity during a 30A discharge.
The documented cycle test uses a 6A charge and 40A discharge, with discharge ending at 2.5V or a 75°C temperature cutoff. After 500 cycles, capacity must remain at least 60% of the initial value. Actual service life depends on current, temperature, depth of discharge and pack cooling.
Custom battery pack applications: Potential applications include professional power tools, robotic equipment, light electric mobility, portable power systems and other high-current products after application-specific validation. MisenBattery supplies TENPOWER cells and supports custom pack integration incorporating a compatible BMS, series fuse, welded interconnects, voltage and temperature sensing, insulation, cell spacing, mechanical restraint and thermal management. 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 “TENPOWER confidential proprietary,” so authorization should be confirmed before publishing its contents.
