![batteries - Why is the negative contact in a battery bay always the side with some sort of spring? - Electrical Engineering Stack Exchange batteries - Why is the negative contact in a battery bay always the side with some sort of spring? - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/63hxC.jpg)
batteries - Why is the negative contact in a battery bay always the side with some sort of spring? - Electrical Engineering Stack Exchange
![I'm probably just stupid but dynex decided to put plastic tabs on the battery compartment so that in case you put your batteries in the wrong way you can't get them out. : I'm probably just stupid but dynex decided to put plastic tabs on the battery compartment so that in case you put your batteries in the wrong way you can't get them out. :](https://preview.redd.it/arlxllu1pr881.jpg?width=640&crop=smart&auto=webp&s=0d7b425261e6ad354f94f231e87d94669e4a7cfd)
I'm probably just stupid but dynex decided to put plastic tabs on the battery compartment so that in case you put your batteries in the wrong way you can't get them out. :
![How To Correctly Install Batteries In My PeeDar Or PeeDar 2.0 UV Flashlight - Urine Eradication Systems How To Correctly Install Batteries In My PeeDar Or PeeDar 2.0 UV Flashlight - Urine Eradication Systems](http://www.urineeradicationsystems.com/wp-content/uploads/2017/06/20170601_163427-1030x773.jpg)
How To Correctly Install Batteries In My PeeDar Or PeeDar 2.0 UV Flashlight - Urine Eradication Systems
![Microsoft makes it impossible to put batteries in the wrong way (Microsoft?!?) | AnandTech Forums: Technology, Hardware, Software, and Deals Microsoft makes it impossible to put batteries in the wrong way (Microsoft?!?) | AnandTech Forums: Technology, Hardware, Software, and Deals](http://i.dailymail.co.uk/i/pix/2010/07/06/article-0-0A5722F4000005DC-261_468x286.jpg)