Features: Solar powered charger, environmental friendly. Can charge 2*AA and 2*AAA rechargeable batteries at the same time. With LED indicator for charging status. Portable size, easy and convenient to use. Built-in IC and IN5819, preventing reverse current under no light condition. Note: Due to series circuit, please charge 2*AA or 2*AAA rechargeable batteries at the same time(4pcs also OK). The batteries are not included!