General description This solar charger is designed for charging 2 AA or AAA rechargeable batteries simultaneously, making it an environmentally friendly choice for battery maintenance. Please note that batteries are not included. Technical specifications Color: Black Material: Polycrystalline Silicon + ABS Solar Panel Power: 1W Operating Voltage: 4V Open Circuit Voltage: 4.68V Operating Current: 250mA Short Circuit Current: 260mA Battery Type: 2 x AA/AAA rechargeable batteries (not included) Item Size: 115 x 68 x 26 mm Item Weight: 82 g / 2.9 oz Package Size: 11.7 x 7.5 x 3 cm Package Weight: 100 g / 3.55 oz Usage Due to the series circuit design, it is recommended to charge either 2 AA rechargeable batteries or 2 AAA batteries at the same time (4 pieces total is also acceptable).