Car battery maintainer can charge 12V batteries with the power of the sun and create 7.5 watts of energy.
Solar panel works in all daylight conditions and is water resistant(some rain drop is OK,but not completely rainproof)for added durability.
Works with automobile,motorcycle,tractor,boat batteries and more.
Built-in blocking diode to prevent reverse discharge.
Extends battery life by keeping it in a good state of charge,connect to the battery through the cigarette lighter socket or alligator clip.