Soonhua 18v 2w Portable Solar Panel Battery Pack Charger Backup for Cars Motorcycle Laptops/computer Product is for your car battery, notebook computer or other 12V rechargeable battery designed for emergency charging deveces, trickle charge the battery with the solar power. For your work or travel in the wild or camping 18V 2W Poly Silicon Solar Panel Car Battery Charger for Cars / Trucks / Boat / Motorcycle / Laptop work or travel in the wild, or camping Portable design and easy to carry. The product has anti-overcharge, over-release, short circuit, over-current protection function etc.