You Do Need power plug adapter while traveling from Sierra Leone to United Arab Emirates (UAE).

Here is Why You Need An Adapter

The outlet and plug type used in United Arab Emirates (UAE) is G and in Sierra Leone are D and G. This is how they look like.

Sierra Leone

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

Type D

Type G

United Arab Emirates (UAE)

In United Arab Emirates (UAE), outlets of type G are in use.

Type G