for iOS 9.1 software

which also allows you to sync iPhone with iTunes. See .

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. Go to Settings > Battery >

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 > Battery > 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 should be replaced by Apple or an authorized service

provider. See .

Sync with iTunes