The Bosch BA 18-12 Professional Battery Adapter is suitabe for the GLL 18V-120-33 CG laser level and allows it to run off a Bosch Professional 12v power battery (as well as the 10.8v lithium ion batteries which preceded them). The adapter therefore ensures that you can keep working even when your 18v battery is recharging by switching to a smaller backup battery in the meantime Whether you're on-site or in the workshop, the BA 18-12 provides a practical backup power solution, allowing you to switch between Boschs 12v and 18v battery platforms without the need for multiple tools. Features and BenefitsFlexible power adapter for continuous workA reliable backup power source for the GLL 18V-120-33 CG to improve your working efficiencyWork without interruptions by switching from the 18v battery to the Bosch Professional 12v SpecificationsManufacturer Code: 1 608 M00 C4AApprox Weight: 0.12kg