Panasonic NCR21700T is a high-performance lithium-ion battery known for its high energy density and high discharge capabilities. While often associated with Tesla Model 3 and Model Y
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
The cell includes an integrated PTC (Positive Temperature Coefficient) resistor that increases resistance during temperature spikes to prevent short-circuits, alongside a built-in safety valve to relieve internal pressure. Charging and Storage Guidelines causing internal short circuits. Also