I lived in Indonesia for many years. It is pronounced bah (as in bah-bah-black-sheep) teek, with the emphasis on teek.
batik rhymes with critique, mystique, physique, Monique......
Hmmmm, I just realized that the bah-bah-black-sheep is probably pronounced in different ways in different parts of the country. What I mean by bah is something that rhymes with Ma,Pa, draw, saw, claw.