Mini keyboard 18650 Housing

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5746280.

If your mini keyboard battery life is low and you have some 18650 batteries lying around, use this adapter to change the back battery cover.

P.S :- This design is a result of some free time and useless spare parts. Also there will be signifcant change in fit and weight of the keyboard.