You Do Need power plug adapter while traveling from Sint Eustatius to Sint Maarten.

Here is Why You Need An Adapter

The outlet and plug type used in Sint Maarten are A and B and in Sint Eustatius are A, B, C and F. This is how they look like.

Sint Eustatius

In Sint Eustatius, outlets of type A, B, C and F are in use.

Type A

Type B

Type C

Type F

Sint Maarten

In Sint Maarten, outlets of type A and B are in use.

Type A

Type B