Lightning to USB Cable Discoloration of the Lightning connector after regular use is normal. Dirt,
debris, and exposure to moisture may cause discoloration. If your Lightning cable or connector
become warm during use or iPhone won’t charge or sync, disconnect it from your computer or power
adapter and clean the Lightning connector with a soft, dry, lint-free cloth. Do not use liquids or
cleaning products when cleaning the Lightning connector.
Certain usage patterns can contribute to the fraying or breaking of cables. The Lightning to USB
Cable, like any other metal wire or cable, is subject to becoming weak or brittle if repeatedly bent in
the same spot. Aim for gentle curves instead of angles in the cable. Regularly inspect the cable and
connector for any kinks, breaks, bends, or other damage. Should you find any such damage,
discontinue use of the Lightning to USB Cable.
Operating temperature iPhone is designed to work in ambient temperatures between 32° and 95°
F (0° and 35° C) and stored in temperatures between -4° and 113° F (-20° and 45° C). iPhone can be
damaged and battery life shortened if stored or operated outside of these temperature ranges. Avoid
exposing iPhone to dramatic changes in temperature or humidity. When you’re using iPhone or
charging the battery, it is normal for iPhone to get warm.
If the interior temperature of iPhone exceeds normal operating temperatures (for example, in a hot
car or in direct sunlight for extended periods of time), you may experience the following as it
attempts to regulate its temperature:
iPhone stops charging.
The screen dims.
A temperature warning screen appears.
Some apps may close.
Important: You may not be able to use iPhone while the temperature warning screen is displayed. If
iPhone can’t regulate its internal temperature, it goes into deep sleep mode until it cools. Move
iPhone to a cooler location out of direct sunlight and wait a few minutes before trying to use iPhone
again.
For more information, see .support.apple.com/HT201678
