[MetaEngineer]

246 launched a battery out of the bot at least twice during drivetrain testing in 2016 before the electronics layout was finalized. Straps of duct tape were acceptable for sedate drive code tuning but not when a high speed robot did a very rapid spin in place.

The poor practice battery got ejected at high speed when the tape came loose, skidding a fair distance along the floor. We used even more tape to strap it back down again, so the second time it just ripped the duct tape in half as it went flying.

We had the coders dial back the maximum turn rate, as in addition to launching batteries it was too fast and twitchy for maneuvering. The final design had a close fitting cradle of angle pieces with velcro strap. A pain to install and remove the batteries, but we never had a loose battery in a match.