Understanding its datasheet is crucial for safe and efficient battery pack design. Technical Specifications Overview
Operating or storing the cell above 45°C or below 0°C.
The datasheet guarantees ≤30 mΩ (AC IR at 1 kHz). Fresh cells often measure 18–22 mΩ. This low IR reduces voltage sag and heating. Over time, IR will rise to ~40 mΩ near end-of-life (500 cycles). High IR is the first sign of a failing cell. panasonic ncr21700t datasheet
The cell includes an integrated PTC (Positive Temperature Coefficient) resistor that increases resistance during temperature spikes to prevent short-circuits, alongside a built-in safety valve to relieve internal pressure. Charging and Storage Guidelines
While many high-power cells have a flat discharge curve that drops sharply near the end, the NCR21700T offers a very smooth, gradual slope. This allows devices with simple voltage-based fuel gauges to estimate remaining capacity with reasonable accuracy. Understanding its datasheet is crucial for safe and
The is a high-performance, cylindrical lithium-ion cell designed for applications requiring a balance of extreme energy density and high discharge capabilities. Often cited as a "Tesla-grade" cell, it is a staple in high-drain power tools, electric bikes, and custom battery packs. Core Technical Specifications
Slower charging (e.g., 1A to 1.5A) reduces internal cell stress and preserves capacity over time. 5. Primary Applications Fresh cells often measure 18–22 mΩ
| Parameter | Value | |-----------|-------| | | NCR21700T | | Nominal Voltage | 3.6 V (3.7 V typical in some revisions) | | Typical Capacity | 5,000 mAh (0.2C discharge, 25°C) | | Minimum Capacity | 4,900 mAh | | Nominal Energy | 18.0 Wh | | Standard Charge Current | 1.5 A (0.3C) | | Max Continuous Discharge Current | 15 A (Note: some datasheets list 12.5A at 80°C cutoff) | | Max Discharge (Pulse) | 30 A (< 5 seconds) | | Internal Impedance (AC, 1kHz) | ≤ 30 mΩ (typical ~20 mΩ) | | Charge Voltage (CC/CV) | 4.20 V ± 0.03 V | | Cut-off Discharge Voltage | 2.50 V | | Cycle Life | ≥ 500 cycles (to 70% of initial capacity at 0.5C/0.5C) | | Weight | 69 g (max) | | Operating Temperature (Discharge) | -20°C to +60°C | | Operating Temperature (Charge) | 0°C to +45°C |
The Panasonic NCR21700T's impressive specifications make it suitable for a wide range of applications, including:
| Parameter | Value | |-----------|--------| | Standard Charge Current | 1.5 A (0.3 C) | | Max. Charge Current | 4 A (0.8 C) | | Charge Cut-off Voltage | 4.20 V ±0.03 V | | Standard Discharge Current | 2.5 A | | Max. Continuous Discharge Current | 15 A (or up to 20 A pulsed, check latest specs) | | Discharge Cut-off Voltage | 2.5 V | | AC Impedance (1 kHz) | ≤ 30 mΩ |
The Panasonic NCR21700T is a high-performance, industrial-grade lithium-ion cell. It utilizes the increasingly popular 21700 form factor. This guide breaks down its datasheet specifications, performance metrics, and safety guidelines. Technical Specifications Overview