Use solar power or optional 4 AA batteries（not included）or optional 6V AC/DC Adapter（not included）. Built-in rechargeable battery. 5 Super-Bright White LED for superior illumination. Long-Life LED last for nearly 100,000 hours. Recharging time will be 6 hours by solar power in full direct sunlight or 6 hours by 6V AC/DC Adapter. The consecutive lighting will be above 8 hours. If use optional 4 fresh AA dry cells, the consecutive lighting will be 24-48hours at full brightness depending on the type of dry cells.