1. Turn off Optimized Battery Charging. If you have the Optimized Battery Charging feature turned on, this could be why your iPhone is stopping at 80%. To fix this issue, head to Settings > Battery and turn off the Optimized Battery Charging option.
Your iPhone might get slightly warmer while it charges. To extend the lifespan of your battery, if the battery gets too warm, software might limit charging above 80 percent. Your iPhone will charge again when the temperature drops. Try moving your iPhone and charger to a cooler location.
There may not be a noticeable change straight away but if you do this every single night, you may see your battery degrade over time. Therefore, charging your phone overnight isn't necessarily bad but you should not do it consistently if you want to get the best out of your battery.
Chargie takes control of the power flow following an algorithm that decreases battery temperature and voltage related stress, throughout the 8 hours of nighttime charging.
In theory, phone makers can stop a phone from charging at 80% or other limits. This can be done by modifying the O/S. But they probably are not going to do that since they want you to buy a new phone every few years. Their hope is that you would ruin your battery prematurely and then you would have to buy a new phone.
Switch to a Different Cable, Adapter, or Outlet
If you're still stuck and wondering why your phone isn't charging, then it's time to take a look at your charging cable. Your cable might have a loose wire, the adapter could have malfunctioned, or the socket it's plugged into could be malfunctioning.
As it stops automatically at 100% you can't overcharge it doing this. You thus start the day with a fully charged phone. And, if you configure the phone for automatic backup using iTunes or iCloud, the phone will back up every night when it has a WiFi connection and is asleep.
Remember that if you disable this feature, your phone will no longer learn your charging patterns and optimize accordingly. This means that your battery life may suffer as a result.
On the More battery settings page, you can tweak some related to battery charging. Tap the switch next to Protect Battery, as shown above, to enable this feature to limit the maximum charging level to 85%. Once this feature is enabled, the phone will stop charging immediately once the battery level reaches 85%.
For optimized battery life, your phone should never go below 20 percent or never above 80 percent. It may put your mind at ease when your smartphone's battery reads 100 percent charge, but it's actually not ideal for the battery.
If you charge your iPhone overnight, that means it remains at 100% charge for hours on end. This is bad and will accelerate battery aging. To fix this, the Optimized Battery Charging feature on your iPhone prevents it from charging past 80% to reduce some of that stress.
The biggest battery drainers are social media apps, including Facebook, Instagram, LinkedIn, Snapchat, YouTube and WhatsApp. They are in the top 20, and all allow 11 features to run in the background. Android and Iphones will refresh background apps periodically by default. This uses your phone's battery and your data.
It is always recommended by experts to start charging your iPhone when it hits 25 percent. Similarly, only charging the battery up to 85 percent will help the iPhone's battery to maintain good battery health and deliver extended battery life.
“Many people have this habit and don't realize the damage it causes to their battery.” So, the trick: Don't let your phone's battery drain completely to zero, and when charging it, only let it reach about 85 percent and then unplug.
Chargie is an app+hardware phone charge limiting solution that makes your battery last for much longer than if you had charged it regularly to 100% all night, every night.
Google notes that when the feature is enabled, the battery lifespan of your Pixel device may increase as the phone will steadily charge during longer charging periods.
Turn on battery optimization for each app
Important: If you turn off battery optimization for an app, that app can run more while you're not using it, even when Adaptive Battery is on. This can use more battery than needed.
The algorithm aims to ensure that your iPhone is still fully charged when unplugged. Optimized Battery Charging is on by default when you set up your iPhone or after updating to iOS 13 or later. To turn off the feature, go to Settings > Battery > Battery Health & Charging and turn off Optimized Battery Charging.