Blackberry 7230 - Manual (Page 140)

8: Reference
140 User Guide
Maintenance
To Do this
Preserve battery life Set the Auto On/Off feature. Refer to page 110.
Turn off the radio when you are not in an area of
wireless coverage: On the Home screen, click the Turn
Wireless Off icon.
Limit your use of the backlighting feature.
Delete the original message when you send a reply.
Refer to page 13.
If you want to send a message to multiple people, use
Add To, Add Cc, or Add Bcc instead of sending the
message multiple times. Refer to page 11.
Charge your handheld regularly.