Palm PIXI PLUS User Manual page 172

8 Remove the battery by putting your finger in the recess to the right of
the battery; push the battery left and then lift it up and out.
9 Insert the new battery.
172 Chapter 11 : Troubleshooting
10 To replace the back cover: Insert the ringer switch into the hole
provided for it on the right side of the back cover.
11 Press the back cover and the body of the phone together at each pair
of clasps. You can feel the clasps engage.
12 Press and hold power on the upper-left corner of your phone until
you see the Palm logo on the screen (approximately five seconds).
Then wait until your phone completes startup.