kenable Dual 12V Car Cigarette Lighter Power Socket 2 way Splitter Cable Lead

Each socket is protected by a 1A fuse.

The splitter has two 1A fuses. Locate the fuse compartment on the splitter and replace it with a fuse of the same rating.

Possibly, but it depends on the vacuum cleaner's power requirements. Check that the vacuum cleaner draws less than 1A.

Clean the mounting surface with alcohol before applying the adhesive pad. Consider using additional double-sided tape or screws for a more secure mount.

Yes, the LED indicator lights up when the splitter is receiving power from the car's cigarette lighter socket.

The cable is 1.2 meters long.

Yes, but unplugging it when not in use can help to prevent unnecessary drain on the car battery.

Check the connection to the car's cigarette lighter socket. Check the fuse in the splitter and replace it if blown.

Ensure the devices draw less than 1A. Check the fuse in the splitter and replace it if blown. Test the devices directly in the car's socket.