Upgrade your Husqvarna Automower with this Genuine OEM Husqvarna battery conversion kit. This kit includes an alloy steel battery that is compatible with the Husqvarna Automower 430X, 440, 450X, and 550 models. Please note that two kits are required for the 440 and 450 models. Ensure the fitment of this kit by contacting us if unsure. Cross-reference numbers include 589585701, 588146402, 588146401/02, and 588146401. This kit contains one battery, as per the description. Improve the performance of your Husqvarna Automower with this battery conversion kit.