Specifications
iPhone 4 Troubleshooting — General Troubleshooting 27
2012-02-21
Charge Battery
The device must have a sucient battery charge to proceed with troubleshooting. A low
battery condition can be the cause of many issues.
If the device has any of the following symptoms, it should be connected to an Apple USB Power
Adapter to charge for up to 10 minutes:
• will not power on
• black screen
• shows the “battery trap” image (left)
• low battery charge
Note: An Apple USB Power Adapter delivers more power than a computer’s USB port, so the
power adapter is the recommended initial charging method for a low battery. Once the device
has started up to the iOS or it has been charging for 10 minutes, it can be disconnected from
the power adapter and connected to a computer.
If troubleshooting or testing will be done without the device connected to power, make sure
the device has a sucient battery charge before continuing.
Important:
• Before connecting any cable to the dock connector or the headphone jack, check the port
condition for debris, contamination, corrosion, liquid, or damage, and clean or remedy this
issue before connecting cables.
• If when charging the device, it becomes too hot, disconnect and replace the device.
Also refer to the following Apple Support articles:
• HT1476: iPhone and iPod touch: Charging the battery
• HT1805: iPhone: About standby and usage time
• About iPhone Batteries: www.apple.com/batteries/iphone.html
• iPhone Battery Performance Test Information: www.apple.com/iphone/battery.html