Panasonic Ncr21700t Datasheet May 2026

| Parameter | Value | Reviewers' Take | |-----------|-------|------------------| | Nominal Capacity | 4800 mAh (0.2C discharge) | Excellent for 21700 format. Slightly above the common 4500-5000 mAh range. | | Nominal Voltage | 3.6V (3.7V typical) | Standard Li-ion. | | Max Discharge Current | 2C (9.6A continuous) / 4C (19.2A pulse) | Major limitation. This is a low-drain cell. | | Standard Charge | 1.4A (0.3C) | Very slow by modern 21700 standards. | | Fast Charge | 3.2A (0.67C) | Still slow. Compare to Samsung 50G or LG M50LT (1C+). | | Max Charge Voltage | 4.20V ±0.03V | Standard, not high-voltage (4.35V). | | Cut-off Voltage | 2.5V | Standard. | | Internal Resistance | ≤ 40 mΩ (AC IR) | Good, but not exceptional (high-power cells are ~10 mΩ). | | Weight | ~69g | Very light for capacity – good energy/weight ratio. | | Operating Temp | Charge: 0~45°C / Discharge: -20~60°C | Standard range. |

It is crucial to distinguish the "T" variant from high-power cells like the Panasonic "PF" or "M" series or high-drain cells used in vaping/power tools. panasonic ncr21700t datasheet

The NCR21700T is an Energy Cell, not a Power Cell. While its capacity is massive, its recommended continuous discharge current is typically rated around 10A. | Parameter | Value | Reviewers' Take |

| Model | Capacity | Max Cont. | Charge Rate | Best For | |-------|----------|-----------|-------------|----------| | Panasonic NCR21700T | 4800 mAh | 9.6A | 3.2A | Low-drain energy storage | | Samsung 50G | 5000 mAh | 9.8A | 4.9A | Slightly better charging | | LG M50LT | 5000 mAh | 14.5A | 3.4A | Better pulse power | | Molicel P42A | 4200 mAh | 45A | 8.4A | High-power (tools, vaping) | | Samsung 40T | 4000 mAh | 35A | 6A | High-power / hybrid | | | Max Discharge Current | 2C (9

Takeaway: The NCR21700T competes in the low-drain energy segment, but Samsung 50G or LG M50LT are often better choices for similar capacity with slightly higher current.

The headline feature of the NCR21700T is its 5000 mAh nominal capacity. In the world of cylindrical cells, this represents the upper echelon of energy density.

For context, a standard high-quality 18650 cell typically offers between 3000 mAh and 3500 mAh. By switching to the 21700 format and the NCR21700T chemistry, designers gain nearly 50% more capacity per cell. This reduction in cell count (fewer cells needed to achieve a target Watt-hour rating) simplifies Battery Management Systems (BMS) and reduces welding points, increasing overall pack reliability.