You Do Need power plug adapter while traveling from North Korea to Bangladesh.

Here is Why You Need An Adapter

The outlet and plug type used in Bangladesh are A, C, D, G and K and in North Korea is C. This is how they look like.

North Korea

In North Korea, outlets of type C are in use.

Type C

Bangladesh

In Bangladesh, outlets of type A, C, D, G and K are in use.

Type A

Type C

Type D

Type G

Type K