![]() Performing a force restart on an iPhone forces any erratic apps and system services to end and thereby allows the system to execute a normal reboot sequence. There are different ways to force restart an iPhone, and the steps vary between iPhone models. This method does not affect any saved data on your iPhone and therefore does not require backup creation beforehand. In the case where your iPhone battery remains yellow even if Low Power Mode is enabled and the battery is fully charged, there’s a tendency that hardware damage is present. To rule that out, you can take your device to the nearest Apple Genius bar for a thorough assessment.Why are you even reading this? If your battery has outgrown its case, it obviously needs to be replaced! Even if it’s not swelling this badly, immediate action should be taken to dispose of the battery safely. But, beware: You do not want to puncture the pack and release its toxic contents. Early signs of a swollen battery include: a hazy white screen, separation between screen and phone body, or “squishiness” of the screen (no visible separation, but your screen moves a bit when you pinch the edges of your phone). Lucky for you, there’s no need to panic-we’ve outlined exactly what to do with a swollen battery here. Once it’s fully charged, perform a soft reset by holding your sleep/wake button and your home button ( sleep/wake and either of the volume buttons on an iPhone X) until the Apple logo shows up.Plug your iPhone into a reliable charger and let it charge uninterrupted until it reaches 100 percent.Use your iPhone until it shuts itself down due to low battery.To re-calibrate your iPhone, follow these steps: If your iPhone suddenly shuts itself down when the battery is half-drained or so, the calibration may be off. If that doesn’t solve your battery woes, then the battery may be the culprit and will require replacement. Techno-babble explanation: Li-ion batteries have a voltage range in which they operate safely, and this is enforced by the power circuitry. As Li-ions age, their internal resistance grows. When the phone does something processor-intensive, it draws significant current. ![]() Pass this current through the increased battery resistance, and you get added heat generation and a substantial voltage drop. This voltage slump trips the power circuitry to cut the battery off in order it to protect it from deep discharge. As a result, your phone shuts off as gracefully as a mirrored cat. It then stops drawing current, which allows the battery voltage to float back up to operating parameters, and the cycle is ready to repeat. If you’re an iPhone 5s or earlier owner-and it has terrible battery life …then your phone is being throttled and would benefit from a battery replacement.
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