Panasonic Ncr21700t Datasheet Hot →

This article is for informational purposes based on publicly available datasheets and third-party tests. Always verify with Panasonic’s official released documentation. Do not exceed 60°C surface temperature during discharge. Battery cells can explode if misused.

At high discharge rates, the datasheet reveals a non-linear voltage drop. At 15A, the voltage sags from 4.2V to approximately 3.2V within the first 30 seconds, then gradually declines to 2.8V at cutoff. More critically, at 45°C ambient (a "hot" environment), the same 15A discharge yields only 3.8 Ah—a 10% capacity loss—due to increased self-discharge and reduced lithium diffusivity. Conversely, at 0°C, the cell cannot safely deliver 15A without lithium plating; the datasheet mandates derating to 8A below 10°C. panasonic ncr21700t datasheet hot

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. This article is for informational purposes based on

The Panasonic NCR21700T is suitable for various applications: Battery cells can explode if misused

Let us highlight three critical sections of the datasheet that most users ignore until their device is smoking.