It was Tuesday, October 27, 2020. I took out my "fiveD" (Canon EOS 5D mark I) from my backpack with the intention to take some macro photos. I charged the batteries and then put them in the camera, but it looked like there were no batteries in it. I took a multimeter out of the drawer to make sure they were really charged....

6 times sanded, 2x smoothed, 3x re-polished and 2x treated surface

As is my habit, since 2017 I have been regularly participating in the national round of the RoboRAVE robotics competition in the Fire Fighting category organized in the Czech Republic by the Association for Youth, Science and Technology AMAVET.