These Einhell 2x 18V 4.0Ah batteries are the universal, interchangeable heart of the Einhell Power X-Change system. Compatible with all products in the Power X-Change range, these batteries are good for your pocket, better for the planet, and great for your garden too. Interchangeable, rechargeable batteries produce less waste from manufacturing, comsume less power than having to charge multiple units, and mean that you can switch from tool to tool as you need to, potentially completing multiple tasks on a single charge. You can also expand your potential with these two 18V 4.0Ah batteries as you will be able to use the 36V range, providing you with more power and more opportunity. Tame nature whilst you protect it, with the Einhell Power X-Change rechargable battery system.