HTC Tilt 8900 - Manual (Page 24)

24 Getting Started
To install the battery
Install the battery by inserting it with its exposed copper part aligned with
the protruding copper conductor on the upper right side of the battery
compartment. Insert the right side of the battery first, then gently push the
battery into place.
Copper
conductor
After you have inserted the battery, replace the back cover.
To remove the battery
1. Make sure your device is turned off.
2. Slide the back cover upward to release and remove the cover.
3. To remove the battery, lift it up from the left end of the battery.