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

Here is Why You Need An Adapter

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

Lithuania

In Lithuania, outlets of type C and F are in use.

Type C

Type F

Sint Eustatius

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

Type A

Type B

Type C

Type F