Don’t require power plug adapter while traveling from Sierra Leone to Nigeria.

Here's why you do not need an adapter

The outlet and plug type used in Nigeria are D and G and in Sierra Leone are D and G and they are compatible with each other.

Sierra Leone

In Sierra Leone, outlets of type D and G are in use.

Type D

Type G

Nigeria

In Nigeria, outlets of type D and G are in use.

Type D

Type G