Up to 30A (peak 40A depending on thermal management) Energy Density: 775 Wh/l (Volumetric)
Panasonic NCR21700T is a high-drain 21700 lithium-ion cell frequently utilized in high-performance applications like electric vehicles and power tools. While an official "public" manufacturer datasheet specifically labeled "T" can be elusive, its performance parameters are well-documented by technical retailers and testing reports. Core Specifications Typical Capacity: 5000mAh (Minimum 4800mAh–4900mAh). Nominal Voltage: 3.6V – 3.7V. Discharge Current: 15A to 30A maximum continuous, with peak bursts up to 40A. Charge Voltage: Промелектроніка Temperature & Thermal Limits
Performance reports indicate that testing typically stops if the surface temperature reaches to prevent cell degradation or thermal instability. Discharge Performance Data from the NCR21700 Datasheet shows characteristics for varying current loads: High-Drain Capability: The cell can handle continuous discharge currents of 5A, 10A, 15A, and up to 20A
Generally around 2.5V to 3.0V depending on the specific application safety settings. Thermal & Operational Limits
Lithium Nickel Cobalt Aluminum Oxide (NCA) type structure Weight: 66.8g (Max) Dimensions: (Flat Top) panasonic ncr21700t datasheet hot
Standardly rated at 15A, but often used up to 30A with proper thermal monitoring; peak bursts up to 40A are possible. Dimensions: 21.1mm diameter by 70.4mm height.
If your NCR21700T is hot after use, wait 45 minutes before charging. Place it on a metal tray (not a plastic charger) to dissipate heat. Only charge at 0.5C (2.2A) or less. Rapid charging at 5.8A will turn a warm cell into a hand grenade.
When analyzing the Panasonic NCR21700T datasheet , a few critical core figures stand out. These parameters dictate exactly how the cell operates under extreme electrical and thermal conditions: NCR21700 data sheet
In this article, we dissect the official Panasonic NCR21700T datasheet, translate the electrical jargon, and explain exactly why this cell runs hot, where the thermal limits are, and how to use it safely without venting your device. Up to 30A (peak 40A depending on thermal
When pushed to 15A or 20A, the internal resistance causes the cell to get hot (thermal increase). However, the
Thanks to its high capacity and low internal resistance, the Panasonic NCR21700T is widely used across many industries:
Given the "hot" nature of this cell, here are four actionable steps derived from the datasheet's application notes.
Cylindrical cells experience internal resistance heating during high-current operations. Managing heat generation is essential for avoiding thermal runaway and preserving cell health. 0°C to +45°C Operating Temperature Range (Discharge): -20°C to +60°C Nominal Voltage: 3
Because the Panasonic NCR21700T operates in a unique and dangerous gray area. On paper, it looks like a monster. In reality, pushing this cell to its limits generates significant heat—and sometimes, a fiery disaster.
The allowable charging range is narrower (0°C to +45°C). Never charge a hot battery.
Before exploring specific operating curves, the baseline mechanical and electrical boundaries of the cell must be understood. This industrial cell relies on a cathode formulation to achieve high volumetric energy density. Specification Parameter Value / Data Metric Form Factor 21700 Cylindrical (21.1mm Diameter x 70.4mm Length) Chemistry Lithium-Ion (NCA Cathode) Nominal Capacity 5000 mAh (Typical) / 4800 mAh (Minimum) Nominal Voltage Maximum Charge Voltage 4.2V ± 0.05V Discharge Cut-off Voltage Max Continuous Discharge Current 30A (With adequate thermal management up to 40A peak) Internal Impedance ≤ 12 mΩ (AC 1kHz) Cycle Life
0°C to +45°C. Charging at high temperatures (above 45°C) can cause thermal instability. Storage Range: -20°C to +50°C. High-Drain "Hot" Behavior