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I want to see what my current, calculated standby and daily battery life statistics are before Android M is available on my device, so I can see if I've actually an improvement.

Is it possible for me to see such stats on the phone itself?

  • The best statistics natively can be seen from the service batterystats. Do "adb shell dumpsys batterystats" to see the magic. My answer or Matthew Read's answer should give you a hint. Otherwise, consider third-party apps to log the statistics for some interval. GSam, BBS or BatteryStatsPlus can help. – Firelord Sep 30 '15 at 11:31
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The simplest method of doing this would be to install GSam Battery Monitor. It gives a clear representation of what functions are draining the battery very precisely and does not "package" battery consumers as the stock monitor does. (Packaging being taking separate processes and representing them as a single entity in it's consumption.

Google play services is one of the big offenders of this. Stock will usually give a 15x larger burden to GP services when in fact battery drain may just be pinned on it from the kernel or system.

Here's a nice snapshot comparison.

Stock:

(Click image to enlarge)

IMG:

Standby is not even listed as an entity on GSam, but is instead delegated to each offending process.

(Both screenshots are taken at 80% charge. Be aware that GSam just scales the used amount to 100% while the stock does not.)

GSam Battery Monitor (Google Play Store):

IMG: IMG:

Personally, the stock monitor seems to be a bit buggy and unreliable anyway. 1% for screen? Really?

  • I know all of the pics just became identical. I'm looking at it. (Fixed) – Ethan Z Sep 30 '15 at 19:53
  • Please don't mess up with the revisions and the images are not identical. See Why can people edit my posts? How does editing work? – Firelord Sep 30 '15 at 23:19
  • @firelord, they are not identical because I fixed them. Something broke when I added the link to the play store for GSam. That and a note that GSam's measurements are based on percentages of the used battery while stock uses total battery life for its percentages. No other edits were made. – Ethan Z Sep 30 '15 at 23:23
  • Don't know what you're saying but anyhow, unless you've something to fix in the post (grammatical) or add something new, please let it be like it is now. – Firelord Sep 30 '15 at 23:25

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