The 20W Solar Panel Battery Charger is a new environmentally friendly and easy to use solution to many day to day battery issues. It is a new safe and cost effective way to extend the life and charge of your battery. The three main components consist of the solar panel, smart charger and connecting leads and work together to get electricity generated by the sun into your battery to maintain the optimal level of power without overcharging it. The simple to use 2 clamp wire connectors make this unit easy to use and move to an area that has an abundance of sunlight. The connector is suitable for charging all jump starters and charge packs. Depending on the level of charge in your battery the Smart Solar Charger automatically switches the level of charge from boost charging state to float charging state and will also cut the current to the battery once the surface charge reaches the optimal level of 14V.