Detailed Product Description Solar bicycle lampSolar panel specification:multi-crystalline silicon 2.5V 130mA 0.31W Rechargeable basic zinc-manganese battery 2pcs AA 1.5V 2000mA Size:115x55x40mm 4)Weight:190g 5)Color:silver,grey,yellow,green,blue,light,blue 6)Charge time:12hours,automatic charge under sunlight even can work under dim light 7)Work time: 48hours