Buy an infrared thermometer. If the metal can exceeds , stop discharging. The datasheet explicitly states that exceeding 60°C voids the warranty and accelerates aging.
is mandatory to prevent fire or thermal runaway when pushed to high temperatures. Промелектроніка Performance Characteristics NCR21700 data sheet panasonic ncr21700t datasheet hot
You're looking for information on the Panasonic NCR21700T datasheet! Buy an infrared thermometer
The Panasonic NCR21700T is an excellent cell 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. is mandatory to prevent fire or thermal runaway
At 20°C ambient, the NCR21700T datasheet specifies a nominal capacity of 4.0 Ah to 4.2 Ah with a nominal voltage of 3.6V. The "hot" classification arises from its maximum continuous discharge rating: (depending on temperature cutoff settings). Unlike lower-impedance cells (e.g., Molicel P42A), the NCR21700T operates near its thermal limit at 20A. The datasheet explicitly warns that continuous discharge at >15A will elevate the cell surface temperature beyond 60°C , a critical threshold where cycle life degrades exponentially.
: Supports a maximum continuous discharge current of 30A , with peak pulses up to 40A .
Panasonic hides the true power limitation in the pulsed data. For a 10-second pulse, the cell can handle 45A. However, the recovery time between pulses is critical. If you are pulling 35A continuously (as implied by the "max continuous" rating), you will hit the cut-off if used in a protected cell, or you will hit the Thermal Trip in your mod.