You Do Need power plug adapter while traveling from Cameroon 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 Cameroon are C and E. This is how they look like.

Cameroon

In Cameroon, outlets of type C and E are in use.

Type C

Type E

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