Charging an electric vehicle (EV) battery to 100% does not necessarily damage it, but it may have some negative effects on the battery’s long-term health. Lithium-ion batteries, which are commonly used in EVs, prefer to be kept at a state of charge between 20-80%. When a battery is charged to 100%, it is subjected to higher voltage and temperatures, which can accelerate the degradation of the battery’s capacity over time. Therefore, it is recommended to avoid charging an EV to 100% on a regular basis, especially if it is not necessary for your driving needs. However, it is generally safe to charge an EV to 100% when necessary, such as for a long road trip or when you know you will need the full range of your vehicle.