... BatteryMaintenance-free lead-acid, 4V/3500 MAHCharge TimeAC 220V-12 Hours; Solar-20 HoursLighting Hour12 Hours for I setting; 20 Hours ... it means the battery might not be charged enough. Please charge and it can resume to be used.ApplicationsRural homes, campers ... light, tube light, ceiling light, spot light ,bulb light series. LED solar light series and so on. 2012 HOT SELL PRODUCTS : 3W LED ...