SE 150 Solar Trickle Charger. 150mA (2.25W) Trickle charge your car or small boat battery. This compact trickle charger comes with suction cups so mounts inside, virtually anywhere and connects with a cigarette lighter or battery ring adaptors. The SE 150 is not waterproof or large enough to maintain a large battery. It is easy to use. Weighing less than a pound, this portable solar panel is engineered with simplicity in mind. Just expose the SE 150 to daylight and it begins storing solar energy while charging your battery. It works in cloud or shine, through windshields and windows. Push button indicator lets you know that the panel is working. Charges your battery via the cigarette lighter or connect to your battery through battery clamps. Retractable wings and suction cups for window mounting.