Datasheet — Panasonic Ncr21700t

For longest life, stay ≤10A. For occasional 15A bursts (e.g., power tools), the cell performs admirably.

Do not charge below 0°C. Lithium plating occurs, causing internal short circuits. Also, do not float charge – terminate when current drops to <100 mA. panasonic ncr21700t datasheet

If you're unable to find the datasheet, I can try to provide some general information about the Panasonic NCR21700T battery cell. For longest life, stay ≤10A