Panasonic Ncr21700t Datasheet

The headline says 35A Max discharge. But look at the temperature graph. If you actually pull 35A continuously, the cell will hit 90В°C+ (194В°F) very quickly.

| Condition | Temperature |
|-----------|-------------|
| Charge | 0В°C to 45В°C |
| Discharge | -20В°C to 60В°C |
| Storage (1 month) | -20В°C to 50В°C |
| Storage (1 year) | -20В°C to 25В°C (recommended 15В°C) | panasonic ncr21700t datasheet

The datasheet guarantees ≤30 mΩ (AC IR at 1 kHz). Fresh cells often measure 18–22 mΩ. This low IR reduces voltage sag and heating. Over time, IR will rise to ~40 mΩ near end-of-life (500 cycles). High IR is the first sign of a failing cell. The headline says 35A Max discharge