1Professional Design: This power tool battery adapter converts the for 18V battery to the battery for Einhell power tools. There is no need to purchase additional batteries. 2Stability and Safety: The power tool battery adapter is designed to be stable, which ensures that the battery is firmly connected to the tool and avoids power failure or loosening. Strict safety certification, so there will be no dangerous conditions such as battery short circuits when used. 3High Flexibility: The adapter allows users to use existing for 18V batteries in the for Einhell range of power tools, broadening the range of tool options and increasing flexibility. 4Environmentally Sustainable: By using adapter converters, battery waste and disposal are minimized, effectively improving the service life and recycling rate of batteries, saving energy and environmental guard. 5Premium Materials: The adapter is made of premium ABS material, which has high strength and durability to ensure long term use and stable connection.