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| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Model | NCR18650B | Manufacturer | Panasonic |
| Cell Type | Rechargeable lithium-ion cell | Format | Cylindrical 18650 |
| Nominal Voltage | 3.6V | Rated Capacity | 3200mAh minimum at 20°C |
| Nominal Capacity | 3250mAh minimum; 3350mAh typical at 25°C | Typical Energy | Approximately 12.06Wh, calculated from 3.6V × 3.35Ah |
| Charging Method | Constant current–constant voltage (CC-CV) | Charging Voltage | 4.20V |
| Standard Charge Current | 1625mA | Standard Charge Time | 4.0 hours |
| Charge-Test Cutoff | 65mA in the published performance tests | Discharge-Test Cutoff | 2.50V in the published performance tests |
| Discharge-Rate Data | Characterization curves shown from 0.2C to 2.0C at 25°C | Rated Discharge Current | Not defined in the provided performance summary |
| Charge Temperature | +10°C to +45°C | Discharge Temperature | −20°C to +60°C |
| Storage Temperature | −20°C to +50°C | Weight | 47.5g maximum |
| Typical Bare-Cell Size | 18.2mm diameter × 64.93mm height | Maximum Size | 18.25mm diameter × 65.10mm height, excluding tube |
| Volumetric Energy Density | 676Wh/L | Gravimetric Energy Density | 243Wh/kg |
The Panasonic NCR18650B is an energy-focused 18650 lithium-ion cell with 3350mAh typical capacity, 3.6V nominal voltage, and approximately 12.06Wh of calculated typical energy. Its cylindrical format, established CC-CV charging profile, and published temperature-performance data make it a practical candidate for professionally engineered battery packs where runtime and compact energy storage are prioritized over unspecified high-current capability.
Panasonic specifies a 3350mAh typical nominal capacity at 25°C, with 3250mAh minimum nominal capacity and 3200mAh minimum rated capacity at 20°C. These distinct capacity grades provide transparent engineering reference points when estimating pack runtime, selecting cell counts, and establishing acceptance criteria for an application.
At 3.6V nominal voltage and 3.35Ah typical capacity, one cell provides approximately 12.06Wh of calculated nominal energy. The manufacturer also reports energy densities of 243Wh/kg and 676Wh/L, supporting space-conscious battery designs that prioritize stored energy, operating time, and manageable pack volume.
The cylindrical bare cell measures approximately 18.2mm in diameter and 64.93mm in height, with a maximum weight of 47.5g. Panasonic lists maximum dimensions of 18.25 × 65.10mm without the outer tube, so finished-cell tolerances, insulation, holders, and assembly clearances should be confirmed before mechanical tooling.
The specified charging method is constant current–constant voltage to 4.20V. Standard charging uses 1625mA with a listed four-hour charge time, while the published characterization tests terminate at 65mA. A precision charger and pack BMS should enforce voltage, current, temperature, and charge-termination limits for every cell group.
Manufacturer curves characterize discharge behavior from 0.2C through 2.0C at 25°C, using a 2.50V test cutoff. Because the supplied performance summary does not declare maximum continuous or pulse current, the 2C trace is treated only as test data. Pack current must be validated against the current production specification.
The listed ambient range is +10°C to +45°C for charging and −20°C to +60°C for discharging. Published curves also illustrate reduced low-temperature capacity and voltage performance. System controls should block charging below the permitted range and use temperature sensing, appropriate spacing, insulation, and thermal design for the intended duty cycle.
Custom battery pack applications: Suitable validated uses may include portable instruments, lighting systems, backup-power products, communications equipment, and energy-oriented battery modules. MisenBattery supplies Panasonic cells and supports custom pack integration with an appropriately rated BMS, fuse protection, welded interconnects, temperature sensing, electrical insulation, cell spacing, and application-specific thermal and mechanical design. Applicable CE, UN38.3, RoHS, and UL documentation can be provided when available for the selected cell, completed pack, or shipment; confirm requirements and the current Panasonic production specification before ordering.
