In the room where General Kota's image is projected - the Kaiburr Power Crystal is at the end of the balcony, above the door opened with force sight/grip, hidden behind boxes. The Opila Power Crystal will be hidden in the rubble of those slot machines. In the 2nd casino level - get off the elevator, go down the stairs, and destroy the slot machines at the bottom left of the stairs. In the open area where shields come up and you must use force grip three times to disable them all - the Lorrdian Power Crystal is behind the elevator between the two turrets. The Rubat Power Crystal is on the right, hidden behind some boxes. After using lightning to stop a fan the 2nd time, go through the fan, turn right, where three Storm Troopers will be shooting at you. Many times you need to have Force Sight turned on to be able to see where the crystals are.

When playing on the Unleashed difficulty level, each power crystal shows up again on the same levels as before - but in different places - so that you can use the same type of crystal in each light saber.

The force unleashed 2 saber crystals