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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Manufacturer | E-One Moli Energy / Molicel | Model | INR-21700-P42A |
| Cell Type | Rechargeable lithium-ion power cell | Cell Format | 21700 cylindrical steel can |
| Typical Capacity | 4200mAh / 15.5Wh | Minimum Capacity | 4000mAh / 14.7Wh |
| Nominal Voltage | 3.60V | Charge Voltage | 4.20V |
| Discharge Cut-Off Voltage | 2.50V | Standard Charge Current | 4.2A / 1C |
| Standard Charge Time | 1.5 hours | Continuous Discharge Current | 45A |
| Typical AC Impedance | <10mΩ at 1kHz | Typical DC Impedance | 16mΩ under a 10A, 1-second test |
| Charge Temperature | 0°C to 60°C | Discharge Temperature | −40°C to 60°C |
| Dimensions | Diameter ≤21.55mm; height ≤70.15mm | Typical Weight | 67g |
| Volumetric Energy Density | 615Wh/L | Gravimetric Energy Density | 230Wh/kg |
| Reference Charge Profile | 4.2A CC-CV to 4.20V, 50mA current taper | Source Document | October 2018 confidential presentation |
The Molicel INR-21700-P42A is a high-power 21700 rechargeable lithium-ion cell combining 4200mAh typical capacity with a specified 45A continuous discharge capability. Its 15.5Wh typical energy, low impedance and wide discharge-temperature range support professionally engineered battery packs requiring strong power delivery without abandoning useful runtime. Final pack design must be validated against Molicel’s current authorized public specification.
The P42A provides 4200mAh and 15.5Wh typical capacity, with minimum values of 4000mAh and 14.7Wh. This balance of energy and current capability makes the cell suitable for pack designs requiring powerful acceleration or load response while retaining practical runtime in the established 21700 cylindrical format.
Molicel identifies 45A as the continuous discharge-current specification for the INR-21700-P42A. This high-current capability supports demanding pack-level loads, but the final allowable current must account for cell temperature, cooling, spacing, interconnect resistance and duty cycle. A separate pulse-current value or duration is not specified in the source data table.
Typical AC impedance is listed below 10mΩ at 1kHz, while typical DC impedance is 16mΩ under a 10A, one-second test. Low cell impedance helps reduce voltage drop and resistive heating under load, although complete pack performance also depends on cell matching, welded connections, busbar resistance, temperature and state of charge.
The documented standard charge current is 4.2A, corresponding to 1C, with a stated charging time of approximately 1.5 hours. Reference testing uses a 4.2A CC-CV profile to 4.20V with a 50mA current taper. Charger and BMS limits must be coordinated with temperature monitoring and the latest authorized specification.
The stated operating range covers charging from 0°C to 60°C and discharging from −40°C to 60°C. These limits do not imply equal capacity or current capability at every temperature. Cold-environment designs require suitable voltage thresholds, current derating, thermal sensing and validation under the actual pack configuration and load profile.
The steel-can cell has a maximum diameter of 21.55mm, maximum height of 70.15mm and typical weight of 67g. Published energy-density values are 615Wh/L and 230Wh/kg. These physical characteristics support compact series-parallel pack layouts with appropriate holders, insulation, airflow and mechanical restraint.
Custom battery pack applications: After application-specific validation, the Molicel INR-21700-P42A can support high-power tools, light-mobility systems, robotics, industrial equipment and performance-oriented portable power packs. MisenBattery supplies cells and supports custom pack integration with a matched BMS, fuse protection, welded interconnects, cell-level voltage and temperature sensing, insulation, controlled spacing, thermal management and mechanical restraint. The cell must not be used as an unprotected standalone battery. Supporting CE, UN38.3, RoHS and UL documentation can be provided when available for the applicable cell, completed pack and shipment. Because the supplied source is marked confidential, obtain authorization and verify every published value against Molicel’s latest public Product Data Sheet before putting this listing online.
