Check your battery stats with the OnePlus Diagnostic Tool
By @edent
· android HowTo oneplus · 5 comments · 200 words · read ~15,611 times.
My OnePlus 5T is 3.5 years old and, after daily abuse, its battery life is starting to fade. But how bad is it?
OnePlus have a diagnostic tool which, annoyingly, isn't available in the Google Play store. And is a bit of a pain to run. So here's a quick tutorial.
Download the app
APK Mirror have a copy of OnePlus Diagnostic 2.1. There may be a later version by the time you read this.
Download and install it. But how do you run it? I couldn't find it in my app list.
Install App Manager
From the F-Droid repository, install App Manager. This will show you all the apps on your phone and all the activities which can be launched.
Open the "Diagnose" app: 
Under "Activities" click the "View Battery Status": 
That will give you your battery state: 
Mine is at 54%, so looks like I need a new battery!
New Batteries Make Everything Better
Thanks for the guide, it was a indeed a bit of a faff to get it working. It seems that my OnePlus 7 Pro battery is still 86% healthy. I’ve had it for about 2.5 years so that’s not bad.
Pragati Singh says:
How to download this Its not installing
@edent says:
What steps have you followed? There is a download link on https://www.apkmirror.com/apk/oneplus-ltd/oneplus-diagnostic/oneplus-diagnostic-2-1-0-release/oneplus-diagnostic-2-1-0-android-apk-download/ - what happens when you click it?
hasham says:
Sir I try to install the app it's say it conflicts with a package that is already on the phonr
@edent says:
Sounds like you already have it installed. You either need to find a way to launch it, or buy a new phone. Or, do as I did, and install Lineage OS.