Specifications

iPhone 4 Symptom Charts — Power Issues 36
2012-02-21
Battery Will Not Charge
Known-Good Parts & Materials Required: USB Power Adapter, Dock Connector to USB Cable,
iOS diagnostics, computer running the latest version of iTunes with a known-good USB port
Quick Check
Symptoms Quick Check
• Battery will not charge from
USB Power Adapter
• Battery charge icon does not
show fully charged
1. Probe whether the user charges their device
using the USB Power Adapter or another power
source. Other USB adapters may not provide
enough power to charge the device.
2. Important: Battery and charge indicators can
uctuate briey when you connect the device to
power or wake it from sleep. If this occurs, wait
a few seconds and then check again. Battery
percentage can remain at 99% with a full charge.
This is expected behavior and does not indicate a
battery or hardware issue.
3. Restart the device.
4. If you can’t restart the device, reset the device.
Deep Dive
Check Result Action
1. Attempt to charge the battery.
Plug the device into a known-
good power adapter and cable
to charge the battery. Allow up
to 2 minutes for the device to
respond.
Did the device wake to the
“battery trap” image (at left) or
to the “slide to unlock” screen?
Battery
Trap
Go to step 2.
Slide to
Unlock
Go to step 3.
2. Continue charging.
Charge the device for up to an
additional 10 minutes.
After 10 minutes, did the
device wake to the “slide to
unlock” screen?
Yes Go to step 3.
No Determine if the issue is caused by
accidental damage. Refer to the Visual
Mechanical Inspection guidelines.