Palm Pre 2 User Manual page 208

4 Press and release the back cover
5 Slide your thumbnail or a credit card between the back cover and the
phone, starting at the bottom and moving halfway up one side until
you hear the clasp (a) release.
6 Repeat step 5 to release the clasp (b) on the other side of the phone.
208 Chapter 12 : Troubleshooting
release. 7 Lift off the back cover.
8 Remove the battery by pulling the tab that appears at the top of the
battery.
9 Insert the new battery.