9v Battery cap

🔋 9V Battery Safety Cap – No Shorts, No Surprises!

Keep your 9V batteries protected from accidental short circuits with this purpose-built battery cap. Designed for safety, simplicity, and fast printing, this cap is perfect for tossing batteries into drawers, toolboxes, or bags without worry.

✅ Features:

• Terminal protection — fully covers both terminals to prevent shorting.
• Friction-lock retention — uses a center nub that grabs the negative terminal, as shown in the cross-section view.
• Zero-support print — prints clean in ~30 minutes on most machines.
• Bonus — Often covers USB ports on rechargeable 9V batteries, depending on the model.
• Fits most 9V battery brands, including alkaline and USB-rechargeable types.
  🖼 See the included cross-section image to view the clever internal retention mechanism in action.

🛠 Print Recommendations:

• No supports needed.
• PLA, PETG, or even flexible materials work well.
• Use batches for quick multi-battery coverage.

🧠 Notes:

Due to slight variations across battery brands, fit may vary slightly, but the design’s geometry ensures broad compatibility and secure retention in most cases. The cap is particularly useful for field kits, drawer storage, or managing live/dead batteries in rotation.