Compare the plug shapes, voltage and frequency in Serbia and Brunei, and find out which adapter you need before you travel.
Adapter required
Yes — coming from Serbia, you will need a travel adapter for Brunei. Serbia uses Type C/Type F plugs, and Brunei uses Type G, so the pin shapes will not fit any wall socket.
Serbia (home)
Brunei (destination)
Electrical specifications in Brunei
Voltage
Frequency
More about plugs in Brunei
In Brunei, the standard power plug is Type G. The country runs on 240 volts at 50 Hz. That means every wall socket in Brunei is the same shape — Type G, and your plug needs to physically match the socket to fit.
Full Brunei plug guide