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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | Misen | Cell Model | INR21700-RS50 |
| Cell Format | 21700 rechargeable cylindrical cell | Chemistry | Lithium-ion; cathode subtype not declared |
| Nominal Voltage | 3.6V | Minimum Capacity | 4,950mAh under standard capacity test |
| Minimum-Basis Energy | Approx. 17.82Wh, calculated from 3.6V × 4.95Ah | Dimensions | Maximum 21.35mm diameter × 70.30mm height, including sleeve |
| Cell Weight | ≤67.0g | AC Internal Resistance | ≤4.0mΩ at 1kHz |
| Charge Voltage | 4.20V | Discharge Cut-off Voltage | 2.50V |
| Standard Charge | 2.5A CC-CV to 4.20V; 100mA cut-off at 25±3°C | Rate Charge | 8A CC-CV to 4.20V; 100mA cut-off at 25±3°C |
| Maximum Continuous Charge | 15A | 15-Minute Step Charge | 10A/2min, 16A/3.5min, 20A/7min, 10A/2.5min to 4.0Ah at 25±3°C |
| Standard Discharge | 1.0A to 2.50V at 25±3°C | Maximum Continuous Discharge | 70A with 80°C cell-temperature cut-off |
| Operating Temperature | Charge: 0°C to 60°C; discharge: -40°C to 80°C | Storage Temperature | 1 year: -20°C to 25°C; 3 months: -20°C to 45°C; 1 month: -20°C to 60°C |
| Room-Temperature Cycle Test | 400 cycles to ≥60% retention with 8A charge/40A discharge or 15A charge/30A discharge | Shipping Voltage | 3.46V to 3.52V |
The Reliance INR21700-RS50 is a high-rate 21700 rechargeable lithium-ion cell combining at least 4,950mAh capacity with a 70A maximum continuous-discharge rating. It also supports 15A continuous charging and a controlled 15-minute step-charge profile. The cell is intended for professionally engineered battery packs with active voltage, current and temperature protection.
The RS50 provides a minimum standard-discharge capacity of 4,950mAh at 25±3°C. The test uses 2.5A CC-CV charging to 4.20V, a 100mA charge cut-off and 1.0A discharge to 2.50V. Based on its 3.6V nominal voltage, minimum-basis nominal energy is approximately 17.82Wh per cell.
Reliance specifies a maximum continuous-discharge current of 70A when an 80°C cell-surface temperature cut-off is implemented. In the 25°C rate-capacity test, the cell retains at least 95% relative capacity at 40A, at least 90% at 50A, at least 60% at 60A and at least 50% at 70A.
The cell supports 8A rate charging and 15A continuous fast charging at 25±3°C. A defined 15-minute step-charge profile uses 10A, 16A, 20A and 10A stages to reach 4.0Ah, equivalent to 80% SOC. This profile requires 4.20V voltage protection and a 55°C charging-temperature protection threshold.
AC internal resistance is limited to 4.0mΩ at 1kHz. In the manufacturer’s 40A temperature-capacity test, the cell delivers 90% relative capacity at -20°C, 92% at -10°C and 95% at 0°C compared with the 25°C result. Charging below 0°C remains prohibited despite the specified low-temperature discharge capability.
At 25±3°C, the cell retains at least 60% capacity after 400 cycles using either 8A charging with 40A discharging or 15A charging with 30A discharging. It also retains at least 80% after 200 cycles with 8A charge and 10A discharge at 0±3°C, preserving the exact test-condition distinctions.
The cylindrical cell measures no more than 21.35mm in diameter and 70.30mm in height, including its sleeve, with a maximum weight of 67g. Its standardized 21700 form factor supports compact high-current modules, but pack designs must allow for dimensional tolerances, insulation, secure retention and heat removal throughout the product lifetime.
Custom battery pack applications: The Reliance INR21700-RS50 is suitable for high-power mobility, power tools, robotics, industrial equipment, performance battery systems and other applications requiring high discharge current and rapid charging. MisenBattery supplies matched cells and supports custom pack integration, including BMS or PCM selection, fuses, welded interconnects, voltage and temperature sensing, insulation, cell spacing, mechanical retention and thermal design. Direct soldering to the cell is prohibited. Supporting CE, UN38.3, RoHS and UL documentation can be provided where applicable to the selected cell, pack configuration and shipment.
