How do you unlock Power Brick 27 in Lego Star Wars?

To unlock Power Brick 27 in LEGO Star Wars, you need to complete the level “Jabba's Palace” in Story Mode. Once you finish the level, switch to Free Play mode and use a character with the ability to use the Force, like a Jedi, to interact with specific objects in the environment. Look for the hidden areas where you can access the Power Brick, which is typically located in a concealed spot. Collect it to unlock the Power Brick for use in the game.