Grip 15 Watt Large Solar Battery Charger

• Preserve battery power in vehicles that use 12 V batteries
• Plugs connect directly to the battery terminals
• Weatherproof design for operation in all daylight conditions
• Built-in overcharge protection

I was a little cautious because there was no picture. It is a solar power battery charger that i have no idea if it is really working? I've only used it once on a 4 day camping trip to charge my battery for my trolling motor. It seemed to have worked.