Panasonic Ncr21700t Datasheet Hot ((top)) May 2026

The Panasonic NCR21700T is a high-performance lithium-ion cell widely regarded as a premium choice for high-drain applications such as electric vehicles, power tools, and robotics. Utilizing a Nickel-Cobalt-Aluminum Oxide (NCA) cathode chemistry, this cell is engineered for high energy density and thermal stability. Core Technical Specifications

The following data highlights the primary performance metrics typical for the NCR21700 series: Nominal Capacity: Approximately 4800mAh to 5000mAh.

Nominal Voltage: 3.6V (consistent across discharge cycles for modern brushless motors).

Maximum Discharge Rate: Capable of sustained high-current delivery, typically rated up to 40A for "hot" high-drain needs. Charge Voltage: Standard 4.20V. panasonic ncr21700t datasheet hot

Discharge Cut-off: Generally around 2.5V to 3.0V depending on the specific application safety settings. Thermal & Operational Limits

According to Panasonic technical documentation, maintaining proper temperature is critical for safety and longevity: Operating Temperatures: Charging: 10°C to +45°C. Discharging: -20°C to +60°C.

Heat Management: While the cell is designed for high-drain use, continuous operation at its maximum current (40A) can generate significant internal heat. Many expert guides recommend a more conservative continuous discharge to prevent thermal throttling. Key Advantages Panasonic Lithium Batteries Handbook ❌ Bad for:

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❌ Bad for:

• High-wattage vaping (over 100W): A single 21700 at 4V would need 25A to hit 100W. The NCR21700T will sag below 3.2V instantly and overheat. Use a Samsung 30T instead (35A).
• Power tools (circular saws, grinders): These draw bursts of 30-40A. The NCR21700T’s voltage sag will trip your tool’s low-voltage cutoff.
• E-bike continuous hill climbing: At 15A for 10+ minutes, expect the battery pack to exceed 70°C, accelerating aging.

Continuous Discharge Current

• Standard Continuous Max: Typically rated around 10A to 15A.
• Pulse Discharge: Can handle short bursts up to 20A, but this generates significant heat.

5. Summary of "Hot" Risks

• Thermal Runaway Risk: If the cell temperature exceeds roughly 130°C–150°C (usually due to external short circuit, overcharge, or physical damage), the chemical reaction becomes self-sustaining (thermal runaway), potentially resulting in fire.
• Degradation: Sustained operation at the "hot" end of the spec (45°C–60°C) will rapidly degrade the cell's capacity.

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Recommendation for Users: While the NCR21700T is a high-capacity cell (4.8Ah), it is optimized for energy density rather than power density. If your application runs "hot" (drawing >10A continuously), this cell may require significant cooling. For high-drain, hot-running applications, a different cell chemistry (like high-drain INR types) may be more appropriate.

4. Cycle Life vs. Temperature

Heat is the primary enemy of battery longevity.

• Standard Conditions (25°C): Panasonic rates cycle life at roughly 500 cycles to 80% capacity retention (assuming standard charge/discharge).
• High-Temperature Operation: Operating consistently at elevated temperatures (e.g., >45°C) accelerates electrolyte decomposition and SEI layer growth, significantly reducing total cycle life (often by 20-30%).
• Low-Temperature Operation: Discharging at high currents in sub-freezing temps increases voltage sag and internal heating, potentially causing uneven thermal stress.

Final Verdict: Is the Panasonic NCR21700T right for you?

The Panasonic NCR21700T is an excellent cell if you respect its thermal limitations. It offers superior capacity (4800mAh) compared to high-power competition. However, the moment you type "Panasonic NCR21700T datasheet hot" into Google, you have likely already exceeded its safe thermal envelope. High-wattage vaping (over 100W): A single 21700 at

Buy this cell if:

• Your average drain is 15A or less.
• You need maximum runtime (e.g., flashlights, laptops, low-power vapes).
• You have active cooling (fans) in your battery pack.

Avoid this cell if:

• You run mechanical mods with super sub-ohm coils (<0.12Ω).
• You are building a power tool that runs continuously for 10 minutes.
• You live in a desert climate (ambient >40°C).

2. Thermal Ratings (The "Hot" Data)

This section covers how the cell behaves under heat and how much heat it generates during use.