53 Hour Battery Life on HTC one-M9 after Android 6 Upgrade!

A few days ago I wrote the post:  “Wow!! 48 Hours Of Battery…”.  To summarize, I discuss the vastly improved battery life on my phone after upgrading to Android 6.  When I wrote that article my phone had been on for one day.  I estimated at the time that the phone should have last me until at least 6pm the next day.

Onto the next day.  The discharge curve indeed held and the phone lasted until about 6:40pm, which was 10 minutes short of 53 hours.  I did allow the phone to go into energy saver mode at 15%.  I would also note that I believe I used the phone more often on the second day, making the battery life even more impressive.

I suppose none of that sounds impressive compared to some other phones.  My HTC one-M9 seems to use a lot of power, and not having to charge it every day is a fantastic new feature.

The people at Google deserve some real credit for this improvement.  If every phone that upgrades gets similar battery life improvement – then the people at Google have saved the world literally millions of dollars.  Numerous internet sources state that over 1 billion Android devices shipped in 2014.  I’m not sure how that number is broken down between tablets and phones, so lets just say 500 million phones.  Now lets do some math:

500,000,000 Devices
* $0.50 US to charge per year (approx)
= $250,000,000 per year
– 1/2 = $125,000,000 – PER YEAR

To be clear, I’m far more excited about charging my phone less/having more power when I need it than I am with the cost savings.  Since the actual charging cost is so nominal I can’t imagine it being an issue for anyone.  However, we live in a day and age where people worry about pulling their charger out of the wall to save the same 50 cents per year (or rather to be green and save the electricity which is the more valuable commodity).  Which is awesome too.

Anyway, great work Google, thanks so much!!

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.