This mod takes inspiration from the functional drawers mod. It uses upgrades to improve a low-tier item charger until it becomes a high-tier item charger.
This mod uses block interaction instead of a GUI, right-clicking inserts items and upgrades into the charger, right-clicking with an empty hand removes the item, and shift right-clicking with an empty hand removes the upgrades.
The charger is not intended to be a battery box, so energy cannot be extracted from the machine.
Use the mod however you'd like
JEI or an equivalent mod for recipes