The Halfords Fully Automatic Battery Charger is a high-quality charging solution suitable for batteries with a capacity ranging from 20-120Ah. With a voltage of 12V, this charger is designed to efficiently charge and maintain your vehicle's battery. The automatic feature ensures easy and convenient use, making it a practical choice for anyone looking to keep their vehicle's battery in top condition. The unit quantity of 3 means you can stock up on chargers for use around the home or on the go.