Remove the 5 screws at the bottom of the Create 3 / Turtlebot 4.
Replacement battery source: https://www.irobot.com/en_US/roomba-accessories/4624864.html
Remove the 5 screws at the bottom of the Create 3 / Turtlebot 4.
Replacement battery source: https://www.irobot.com/en_US/roomba-accessories/4624864.html