Hi friend, the included adaptor can work on both 110v / 240v, its input voltage range is 100-240v. The fountain works on 5v / 1a DC power only.
When the electricity is cut, if the fountain is connected to a UPS, it will still work for some time; otherwise, it will stop working.
There is no place for putting batteries inside the fountain.
Alternatively, you can connect a 5V/1A power bank between the fountain and the USB power to use it as backup power. But we can not guarantee all power banks in the market can work this way!
