DON'T INSERT THE BATTERY UPSIDE DOWN!!! There is a printout on the white face of the battery stating that "this side is down". So you should see the blue face when inserting the battery.
Don't force under any circunstance!
If you experience an issue with your In/Out device, first visit the troubleshooting and On Court Troubleshooting pages. Then fill the support form through the In/Out helpdesk.
If you don't own an In/Out and have a question, contact the In/Out team.
The support website is organized around five categories: Hardware, Software UI, On Court, Firmware Upgrade, Companion App.There is also the Logs and Roadmap.