The Sunforce 50032 15 Watt Solar Battery Charger gives you another reason to love the sun — it’ll help keep your vehicle’s battery charged. Its also a real bargain at only $109.99. Just plug this helpful 15-watt battery charger into your vehicle’s 12-volt lighter socket and position the panel to pick up the most daylight possible. And with the built-in blocking diode technology, this charger is designed to protect against battery discharge at night. You can also use this device to maintain the charge on any 12-volt battery for clean, silent operation of various electronics, such as deer feeders and landscaping pumps.