Battery & charger starter set for your AK System tool. Includes AK 20 battery and AL 101 charger, providing you with everything you need to use your machine. The AK 20 is a 36 V, 4.0 Ah Lithium-Ion battery with an energy capacity of 144 Wh. Has an integrated LED charge indicator, which clearly displays as and when the battery needs charging. Ideal for homeowners working in their garden or, the AK 20 is versatile, long-lasting and durable, making it ideal for demanding gardening tasks. This battery has a cold start feature, which protects the cells by warming them up in a controlled way before delivering full power and allows them to work down to -20° Celsius. The battery also has intelligent battery management system - this clever technology gives a constant level of power whether the battery is 100% charged or 1% charged. The AL 101 is a 230 V charger for your AK System battery (also compatible with AP System batteries). It has an LED indicator which shows you when the battery is charging or is fully charged and has passive battery cooling. It has a Velcro cable strap to keep the cable tidy when not in use and the charger can also be wall mounted to a wall in your workshop or garage.