WD 1 Compact Battery WD 1 is a compact wireless dry/wet vacuum cleaner powered by 18 V battery compatible with the universal battery platform Kärcher, which can be used in all Kärcher devices powered by 18 V battery. Designed to work around the house, in the garage, and especially to vacuum the car. Impressive suction force allows effective and efficient vacuuming. No battery in the kit. Practical solutions Full freedom of work and independence from access to the electricity grid. Technology showing current battery status: remaining operating time, remaining charging time, battery capacity. Compatible with all devices using the 18 V battery platform Kärcher. Vacuum cleaner is convenient to use and easy to transport. It can work dry and wet without having to replace the filter. The vacuum cleaner is equipped with a practical function of blowing - useful when you do not want to collect trash into the tank.