Charging Curve

Power is usually highest at low state of charge and falls as the battery fills. Battery temperature strongly affects it. Many cars charge fastest between about 10 and 80 percent. Comparing peak charging power alone is misleading; the time from 10 to 80 percent shows real-world performance better. Many reviews and owners measure the curve to show how long typical stops take.

The BMS reduces current to protect cells near full charge.

Charging to 100 percent takes much longer than to 80 percent. Cold batteries charge slowly.