Stepdown Converter: Input DC 18V20V; Output DC 12V and DC 5V13V; Output current up to 10A; Efficiency ≥ 95%. Designed for Einhell 18V battery users, it converts Einhell batteries into a reliable 12V power source for vehicles. Includes robust overcurrent and shortcircuit protection to safely power a range of car appliances. Compatible with Einhell 18V Battery: Fully compatible with Einhell Power XChange 18V series, LiIon System4511396, 4511437neu, 4511437OVP, PXBP300, PXBP600, PXBAT52, and related models. Battery adapter connector is well designed, fits snugly, and is easy to install and remove. Includes overload protection, noload poweroff, overcurrent protection, and lowvoltage protection. Convenient Cigarette Lighter Interface and Innovative Design: Features a cigarette lighter interface for effortless connection to car power outlets, enabling quick powering of car appliances without additional installation steps or wiring. Compact, Portable, and Convenient Adapter: Lightweight and easy to carry, suitable for road trips and camping. Powers car gadgets and charges electronics, including automotive supplies and chargers, making it a practical choice for travelers and outdoor enthusiasts. Use scenarios: Road trips: Power a dash cam, GPS, portable cooler, and USB chargers using Einhell 18V batteries. Camping or outdoor activities: Run small cooling devices, lights, and charging packs from the vehicle's 12V system. Emergency vehicle use: Maintain power to essential car electronics during power outages or when away from standard 12V outlets.