for electric vehicles (EVs), differences between a new and old lithium-ion battery can be seen in charging behavior and capacity. A new battery will generally hold a charge longer, have higher efficiency, and can handle higher charging currents and voltages without degrading quickly. So an older battery may charge slower, have reduced capacity, and might be more sensitive to high charging rates, leading to faster degradation.
it’s important to monitor and adjust charging practices as the battery ages to extend its life.