Apple Magic Trackpad - battery cover would not come off.. corroded batteries.. plyers, flat head screwdriver, quarter bent in half, vice grips... : r/techsupportgore
track pad - Apple Community
Apple Magic Keyboard Battery Cover Stuck - YouTube
Repairing Apple Wireless Keyboard without destroying it. - iFixit Repair Guide
Repairing Apple Wireless Keyboard Power Button - iFixit Repair Guide