This is a screen-accuate replica of the sonic screwdriver used by the 9th and 10th Doctors. It's fully 3D printed and hand painted, and the electronics are put together by me as well.  It features a sliding mechansim to extend the translucent section, and the button to make it glow is housed in the slider. Perfect for cosplay or to have up on display!

To access the batteries, slide the translucent section fully up and remove the collar at the top of the handle (you may need a small blade or flat screwdriver). The batteries are housed in a small, open container just under the button. Due to the small space it has to fit in this is made out of quite thin plastic, so be careful not to break it when replacing the batteries.