[ Innovative Charging Method ] New OBD2 plug for maintenance battery charging (engine off) + Traditional alligator clips for direct battery connection.The newly added OBD2 connection cable connects directly to the car battery, allowing continuous charging even when the vehicle is turned off, eliminating the need for regular manual starts. Suitable for vehicle batteries in cars, trucks, boats, lawn mowers, motorcycles, trailers, dump trailers, tractors, RVs, vans, campers, ATVs, construction vehicles, and more [ Upgraded Portable Mount ] The integrated mount can be securely placed on various surfaces such as the car roof, center console, and hood to achieve the optimal sunlight angle for quick, simple, and efficient installation. It also retains the original four convenient PVC suction cups, which can be securely attached to the car window glass with a simple press, allowing for flexible use in various scenarios [ Worry-free Maintainer ] There is no need to worry about vehicles that have been idle for a long time.This 10W 12V Solar Battery Charger, suitable for keeping vehicles/boat battery charged during the weeks unused.No need to disconnect the battery or have someone start the vehicle periodically [ Powerful protection features ] The 10w monocrystalline solar panel uses trickle charging to charge the battery without causing overcharging. Built-in blocking diode prevents reverse charging without extra maintenance at night. The indicator light on the back can observe the charging state. Works even on cloudy days [ Thin & Lightweight Design ] Made with high-efficiency Grade A+ solar cells, UV-resistant waterproof fiberglass, and CPC back panels for better heat dissipation. Small in size and lightweight, making it easy to store. The frosted surface eliminates the need for film protection, you can safely use it outdoors(After experimental test)