This comprehensive technical breakdown serves as the ultimate reference guide to the NCR21700T, compiling verified operational parameters, direct comparisons, and critical safety protocols. Core Specifications Checklist
Similar to those found in Tesla Model 3/Y packs (2170 format). Power Tools & E-bikes:
Capable of sustained high-current delivery, typically rated up to 40A for "hot" high-drain needs. Charge Voltage: Standard 4.20V .
Whether you plan to use in your pack design Your specific target cycle life expectations panasonic ncr21700t datasheet hot
Panasonic NCR21700T is a high-performance lithium-ion battery often used in power tools, e-bikes, and flashlights due to its high discharge performance and large capacity. Below are the key specifications and features typically found in its datasheet: Core Specifications : Standard nominal capacity is , with a minimum rated capacity of approximately Nominal Voltage Max Charging Voltage Discharge Cut-off Voltage : Typically
The first thing to note is that there can be slight variations in reported specifications for the NCR21700T depending on the source or manufacturing batch. However, the core technical data generally aligns around the following key figures.
for high-drain performance, though standard industry cut-off is often cited at : Maximum of Промелектроніка Performance & Thermal Limits Discharge Rate Charge Voltage: Standard 4
The NCR21700T runs hotter than the Samsung 40T under identical loads. Why? Higher internal resistance. While the datasheet claims <18mΩ, real-world DC internal resistance (DCIR) often measures 20-24mΩ at room temperature. As the cell heats up, resistance climbs, creating a vicious heat loop.
The Panasonic NCR21700T is a "hot" cell in the sense of delivering reliable 15A-20A continuous current, but its datasheet makes clear that thermal vigilance is non-negotiable. It is not a low-impedance powerhouse like the Samsung 40T; rather, it is a high-energy cell that tolerates moderate heat when properly managed. Engineers selecting this cell for hot environments (e.g., under-hood EV sensors or high-temperature power banks) must incorporate derating, pulsed load profiles, and forced convection. Ultimately, the NCR21700T datasheet teaches that in lithium-ion engineering, "hot" performance is not about maximizing current—it is about understanding the precise relationship between internal resistance, temperature rise, and long-term reliability.
But in the battery world, “hot” is a double-edged sword. It can mean desirable (high performance, sought after) or dangerous (thermal runaway, capacity loss). However, the core technical data generally aligns around
: Varies by source, typically listed at 30A maximum continuous (with peaks up to 40A) in high-drain applications. Some conservative retail listings suggest 10A–15A for optimal longevity. Operating Temperature (Discharge) : -20°C to +60°C Operating Temperature (Charge) : 0°C to +45°C (Standard)
At a modest , the discharge arc remains highly linear, providing stable power down to the 3.0V step.
The NCR21700T is a preferred "game-changer" for several high-drain sectors: NCR21700 data sheet
The "T" variant is noted for its ability to handle higher current draws compared to standard energy-focused cells.