Chapter 3
Basics
46
Note:
Connecting iPhone to a power outlet can start an iCloud backup or wireless iTunes
syncing. See
on page 173 and
on page 19.
You can also charge the battery by connecting iPhone to your computer, which also allows you
to sync iPhone with iTunes. See
on page 19. Unless your keyboard has a high-
power USB 2.0 or 3.0 port, you must connect iPhone to a USB 2.0 or 3.0 port on your computer.
Important:
The iPhone battery may drain instead of charge, if iPhone is connected to a computer
that’s turned off or is in sleep or standby mode.
See proportion of battery used by each app.
Tap Settings > General > Usage, then tap
Battery Usage.
The battery icon in the upper-right corner shows the battery level or charging status. To display
the percentage of battery charge remaining, go to Settings > General > Usage. When syncing or
using iPhone, it may take longer to charge the battery.
Important:
If iPhone is very low on power, it may display an image of a nearly depleted battery,
indicating that iPhone needs to charge for up to ten minutes before you can use it. If iPhone is
extremely low on power, the display may be blank for up to two minutes before the low-battery
image appears.
Rechargeable batteries have a limited number of charge cycles and may eventually need to
be replaced. The iPhone battery isn’t user replaceable; it can be replaced only by an Apple
Authorized Service Provider. See
www.apple.com/batteries/replacement-and-recycling/
.
Travel with iPhone
If you travel outside your carrier’s network area, you can avoid roaming charges by turning off
voice and data roaming services in Settings > Cellular. See
on page 175.
Some airlines let you keep your iPhone turned on if you switch to Airplane Mode. You can’t make
calls or use Bluetooth, but you can listen to music, play games, watch videos, or use other apps
that don’t require network or phone connections. If the airline allows it, you can turn Wi-Fi or
Bluetooth back on to enable those services, even while in Airplane Mode.
Turn on Airplane Mode.
Swipe up from the bottom edge of the screen to open Control Center,
then tap . You can also turn Airplane Mode on or off in Settings. When airplane mode is on,
appears in the status bar at the top of the screen.
Wi-Fi and Bluetooth can also be turned on or off in Control Center.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
