The crystal battery is a tool that magicians can use to safely contain potent magical crystals and to unleash their power in a controlled manner. Featuring an easily adjustable magical release valve, a robust sealing mechanism, and swappable components for increased crystal compatibility, this device is a versatile tool useful for all magicians.
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For more design details, see the engineering drawings.
I am not a trained engineer. Use these designs at your own risk. That said, I would appreciate feedback, both in terms of design functionality (e.g. whether a fluid seal in a design would actually work IRL) and manufacturability in a world without CNC machines or 3D printers.