'Why is my iPhone battery yellow?': How to enable an iPhone's Low Power Mode to conserve battery
- You may have noticed that the battery symbol on your iPhone turns yellow at times. If you're wondering why, here's the answer: Low Power Mode.
- Your iPhone uses Low Power Mode to extend its battery life. Some features work differently in Low Power Mode — for example, your phone won't fetch email unless you manually ask it to.
- You can easily turn on Low Power Mode at any time. Your iPhone will automatically leave Low Power Mode once you reach 80% charge.
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