iPhone 8 battery is draining very very fast.

The same thing is happening with me too. I have an 8 plus, and I have it at 100% in the morning, and I don't use it all day because I am in school (and I don't use any social media),all of my apps are turned off, bluetooth is off, do not disturb is off, location services is off, my ringer is off, and my brightness is at as low as it gets, yet at 3:00, after it not being used, and it being at 100% in the morning, it is at around 5%. I don't know what is going wrong here.

I just got my iPhone 8+ about 3 months ago and yeah about like 2 weeks ago the battery has been draining insanely fast. I’m on the latest version of iOS. My battery will go down about 20 percent every ten minutes.

It is the same issue for me as well. It takes 3 hours to charge and the battery drains in 5 hours. The phone literally hangs when the battery to is low even with no application running in the background. I recently moved from Andriod and purely disappointed.

I just started to have this problem on my iPhone 8 Plus. It's only about 4 months old and the battery was working fine until about a week ago. I've turned off everything running in the background and closed all apps but the problem persists. I don't know if a just have a bad battery or if this is a bug in iOS.

Uninstall some useless apps, restrict background permissions.

I have this same issue, did you ever find a solution to it ?

I have the same problem. It has only recently started. I have an iPhone 8 plus

Same thing happens with my 8 plus too.

Hello. You should try to reinstall iOS in DFU mode.

https://www.iphonelife.com/content/how-to-fix-battery-drain-ios-10-iphone-10-tip s-longer-battery-life

Can you post a screenshot of settings > battery > usage?