How to Charge an Iron Jetpack

Charging From an Energy Cell

Craft an Energy Cell and place it down. The Energy Cell stores energy and can feed a Jetpack. Put the Jetpack and the Energy Cell in a crafting grid together, or use the cell's charging interaction, to move energy into the Jetpack's buffer. The Jetpack only flies while it has stored energy, so keep it topped up before long trips.

Capacitors and Coils

A Capacitor is the storage component used in the mod's recipes. Coils — Basic Coil, Advanced Coil, Elite Coil, and Ultimate Coil — are crafting ingredients for higher-tier gear. Build the Capacitor and Coil tier that matches your Jetpack so the energy buffer and transfer keep pace with the pack. A mismatched low-tier Capacitor will fill slowly and hold little.

Managing Energy in the Field

Watch the Jetpack's energy while flying. Short bursts conserve energy; long hovers drain it quickly. Carry a charged Energy Cell as a portable top-up so you can refill mid-journey. When you land, move energy from the Energy Cell back into the Jetpack before taking off again. Upgrading to a higher-tier Capacitor increases how much the Jetpack holds, reducing how often you need to recharge.