Will Replacing Iphone Battery Lose Data. That should be enough incentive for you to do a complete backup before changing the battery. I bought my iPhone 7 in December of 2016.
IPhone 8 battery replacement is not however something you should attempt to do on your own. In an effort to make nice with customers the company also reduced the price of replacing out-of-warranty iPhone batteries to 29 from 79. For non-jailbreak iPhones the iTunes backup is very complete.
Just switch it off before you remove the battery and insert a replacement battery.
By the way US law states that third-party modifications or service. Restore iCloud backup after resetting iPhone. If you need a battery replacement your warranty probably bit the big one already. If your iPhone only works plugged it you guessed it replace the battery.
