HTC Xda orbit 2 - Manual (Page 219)

Managing Your Device 219
• Turn Bluetooth off when you are not using it. Make your device visible
to other devices only when you are trying to establish a Bluetooth
partnership. For more information about Bluetooth, see Chapter 10.
• Lower the volume.
• Close battery-intensive programs, such as the Camera, when you are
done using them. Make sure the programs are ended and are not
continuously running in the background.