An LED lighting device includes at least one LED light source emitting light, at least one rechargeable battery for supplying power when external power is not available, at least one electrical connector for connecting the rechargeable battery to external power source for recharging, and at least one control mechanism for switching the operation mode of the device. By setting the operation mode via the control mechanism, the LED light device can be used for more than one intended purposes such as regular lighting, emergency lighting, and flashlight.