Wow!! 48+ Hours of Battery on HTC one-M9 with Android 6 Upgrade!

Yesterday after some long updates, I was prompted to update again, now to version 6 of Android.  Well, that sounded good, a new version of an OS often brings many improvements.  One of the informational pre-upgrade notifications mentioned that battery life could be significantly improved with this new version.  This kind of thing is always exciting, who doesn’t want better battery life without hardware changes?

The updater estimated that the upgrade would take about 1 hour.  I didn’t time it.  Once done, I let my phone charge up fully.  That was yesterday at 2pm.   Incredibly, I noticed a difference in battery life immediately.  After the first 6 hours I had only used about 7% of my battery life.  Like some car gas tanks, I thought that perhaps it just seems like I was using less at first.

During the evening I watched about 45 minutes of youtube with my screen on the first brightness setting (33%).  I was at home for most of the time since I started watching the battery usage.  Of course at home we have our phones on the wi-fi for the better network performance.  But I imagine that means that the phone doesn’t have to talk to the tower thus saving the energy required to transmit that far.  Other than that, I made a few very short calls, a few texts and checked my email and battery level numerous times.

At 2pm today my phone was at 56% battery remaining.  This is unprecedented, when we first brought the HTC one M9 home we could barely make it through the day on a single charge.  If this discharge curve holds, I should be able to use this phone all the way through 6pm tomorrow.  I don’t use my phone as much as I expect others do, I have my location on battery saver and I also don’t have many open/running or installed apps so that probably helps too.

I’m not sure what else has changed with the update.  I noticed a few of the icons in the top bar are different, and also now my carriers name is displayed in the top bar at the left.  Aside from that I didn’t notice a whole lot of other changes – but I’m sure that much was changed under the hood.

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