Capacities vary: small multi-card cases often hold 4 cards, many system cases advertise 12-card libraries, and specialized cartridge holders can offer up to 32 slots.
Manufacturers pair tough exteriors with soft interiors: examples include polycarbonate or other hard shells with shock‑absorbing silicone linings, ballistic nylon or leather/PU exteriors, and vacuum‑formed cases with felt‑lined interiors to cushion cartridges and the console.
Holders typically include small microSD card cases (often holding two cards each), mesh or divided compartments for Joy‑Con and adapters, and bottom trays or pockets with elastic straps for chargers, grips, and other accessories.
Some docks integrate multi-device charging (Joy‑Cons and a Pro controller) with built‑in game‑card slots (commonly around 12), use USB‑C for the base, add RGB lighting, and include intelligent chips to protect against overcurrent and short circuits.
