They both use the 24,000 of hydrogen and like the non-armored one it cannot be worn with a chestplate.
There are 3 modes you can try by pressing a button you can set in the controls within the in-game options.
- Regular (default) : Press Space to increase your height and release to fall. Note: You take damage from falling.
- Hover : Constant flight. Press Space to increase altitude and press ⇧ Shift to decrease. Note : Constantly consumes hydrogen if not stopped.
- Disabled : The jetpack is disabled.