Before you pack: Algeria uses Types C and F, 230 V and 50 Hz. 230 V means no voltage converter – only the plug shape matters.
You will find identical sockets in Guinea-Bissau, Angola, Sao Tome and Principe and Guinea. Nearby but different: the Gambia, Uganda and Botswana – an adapter for Algeria will not fit there. In Africa, 7 of 55 recorded destinations use exactly this combination.
Protective earth
Grounded and ungrounded sockets may occur
Earthed sockets (Type F) and unearthed ones (Type C) exist side by side. For metal-bodied appliances the protective-earth path is what matters.