gure for specifi c cellular technologies, Figure 2.3 shows specifi cally
when, during the operation of a mobile handset, power is consumed:
1. Turn power on – keypad and LCD backlights go on – search for network – welcome.
2. Keypad backlights go off – display goes dark.
3. Display goes on but keypad backlights stay off.
4. Display goes blank.
5. Close fl ip – external display backlight on.
2.2 Power versus Energy Types
Although the words power and energy are often used interchangeably in casual conversation,
it is very important to understand the difference ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.