iRobot 530 Owner's Manual page 32

Unscrew the four screws shown below and remove Roomba's bottom
3
cover.
Remove Roomba's battery.
4
Reinstall Roomba's battery with the iRobot logo facing up.
5
Replace Roomba's bottom cover and the four screws.
6
Replace Roomba's side brush and the side brush screw.
7
32 iRobot Roomba 500 Series