3.6V (nominal), 4.2V (max charge), and 2.5V (discharge cut-off).
Many vapers and flashlight modders run this cell at 30A+ in pulses. The datasheet is clear: . Push it to 20A, and you will see the surface temperature rise from 25°C ambient to over 80°C within 2 minutes. At 85°C, the separator inside the cell begins to degrade, leading to thermal runaway. panasonic ncr21700t datasheet hot
: During high-rate discharge (e.g., 20A+), internal resistance can cause significant surface temperature increases. For safety, these cells should be monitored to ensure they do not exceed a surface temperature of 60°C during operation. 4.2V (max charge)
The following data highlights the primary performance metrics typical for the NCR21700 series : Approximately 4800mAh to 5000mAh . panasonic ncr21700t datasheet hot