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Is there a way to detect if there is a power management issue with an android phone?

I'm rooted on KitKat if that helps.

The phone in question is a galaxy note 4 if it makes a difference.

The symptoms I have are new batteries purchased for the phone going from 40% to dead in a matter of seconds. Recently the phone refuses to charge more than 70% even on a new battery. I'm assuming these are signs of some kind of power management failure.

I'm willing to install any suggested apps if that will help to determine the cause.

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  • My first hunch would be to calibrate the battery: play.google.com/store/apps/… it could be possible that when you are at 70% you are actually at 100%. After calibration, we'd hope to see a more linear decline of battery.
    – WillW
    Nov 15, 2017 at 16:46
  • Wow, that might actually be my issue. I'll try to confirm this either today or tomorrow. If it works please make this an answer so I can accept it. Nov 15, 2017 at 16:48
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    Afraid you're following a myth. All what the app does is deleting the batterystats.bin file (read the app desc). That file only holds stats on battery usage of apps (i.e. which app used how much battery) – NOT on the battery itself. Everything else (charging up to 100% and/or letting the battery drain to below 10%) can be done without an app. Though the problem here is the battery won't even charge up beyond 70%, as the question text says.
    – Izzy
    Nov 15, 2017 at 17:57

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