Sockets in Equatorial Guinea: Types C and E, supplied with 230 V at 50 Hz. No surprises on voltage: Equatorial Guinea runs at 230 V, the same range as at home in the UK.
Handy for multi-stop trips: Benin, Djibouti, Niger and Burkina Faso use the same plug types. Travelling further to Botswana, Nigeria and Zambia means a different adapter. In Africa, 21 of 55 recorded destinations use exactly this combination.
Protective earth
Grounded and ungrounded sockets may occur
Earthed sockets (Type E) and unearthed ones (Type C) exist side by side. For metal-bodied appliances the protective-earth path is what matters.