Android Jelly Bean Improves Battery Life

If you have a Google Galaxy Nexus you must be enjoying sweet Jelly bean already. That’s the beauty of having Nexus branded device and you will always be the first to get OTA updates whenever a new version of Android comes out.

Project Butter, it’s supposed to increase the efficiency of CPU, GPU and Display by letting them to function independently and simultaneously, called Triple Buffering. The outcome is just in front of your eyes, UI transitions are smooth and it opened doors to new polished transitions as well.

However, this should consume more power which leads to slightly lesser battery life. By the time I was getting Jelly Bean I was prepared for this.  But surprisingly it worked the other way around.

Android-Jelly-Bean-Improves-the-Battery-Life

ICS vs Jelly Bean – Power Consumption

When I was using ICS on my Galaxy Nexus and with my general usage style, it could last for approximately 20 hours after 100% charge.

My Wi-Fi was always on as well as Sync. I’m heavy user of Social Media and Web Browsing. At the same time I was addicted to Temple Run as well. With all these I was using Gmail and Calendar apps to manage my professional life. Throughout entire operation display brightness was set to Automatic.

When I updated my phone to Android Jelly Bean I noticed a significant improvement in battery life in the first day. I changed the battery to 100% and used the phone as usual till it reach 4% several times to test this. Here is the outcome.

Android-Jelly-Bean-Improves-the-Battery-Life-Screenshot

Now with Jelly Bean, my Galaxy Nexus could run for nearly 28 hours as you can see in the above screenshot. This is nearly 40% battery life improvement. So Jelly Bean is not only giving you butter smooth performance, at the same time it improves the battery life as well, but how?

What is The Underlying Reason for Improved Battery Life?

In Android Jelly Bean Update log there are two statements about Battery life as below.

Jelly Bean has more reactive and uniform touch responses, and makes your device even more responsive by boosting your device’s CPU instantly when you touch the screen, and turns it down when you don’t need it to improve battery life.

Smart App Updates ensure that only the parts of an application that have changed will be downloaded when you next update it, saving up time, bandwidth, and battery when updating apps.

Second reason is irrelevant to general operations, but first one gives us a hint about improved battery life. However, with that technique alone, Jelly bean won’t be able to achieve 40% of improved battery life according to my personal point of view.

In order to achieve this energy efficiency, Google engineers must have done some serious kernel re-engineering. They must have embedded power management module in to the kernel itself. In addition they must have optimized the source code to consume lesser amount of CPU and other resources to achieve this level of efficiency.

However, I could not find official records to prove this point. You may find out good reason to explain this improved battery life in Jelly Bean devices. Our comment box is open to your point of view, information and experiences.

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10 Responses to "Android Jelly Bean Improves Battery Life"

  1. sandro says:

    I’m really interested in this but how many hours was the screen on?

  2. peter says:

    I agree with you, i did not measure percentages, but it’s clear that they have done something with energy consumption (upgraded from ICS).

  3. Erik says:

    I think you are a very lucky person. On other devices, a lot of users are complaining about seriously reduced battery life with jelly bean. Must be the fault of the manufacturers.

  4. Sivakumar B says:

    In my Galaxy Note GT-N7000, I am facing two nagging issues after updating to Jelly Bean OS v4.1.2 from the good old ICS 4.0.4. First, the Polaris Office is found limited to viewing only in 4.1.2 but earlier in ICS 4.0.4, the full version with editing was there and the very reason why I chose to buy Galaxy Note after spending a whopping Rs.32,000/- was this editing facility in Samsung Galaxy Note GT-N7000. I was shocked to find after the update to 4.1.2 that Polaris Office is reduced to a document viewer only. Why Samsung has done away with the editing facility in Polaris Office, which was very much available in ICS 4.0.4 and was functioning flawlessly? Now, my phone has become a junk piece to carry without any editing facility in Polaris Office. Second, the volume of the Music Player has considerably reduced after the update. One cannot listen to music clearly, sitting in a noisy area like inside a running train, etc. Earlier, it was giving enough of volume in ICS 4.0.4. Of course, the play speed control is a new entrant in the software, but the user is not able to listen and enjoy his stored MP3s because of the reduced volume level with the headphones. Please note that this is not a hardware issue and it is absolutely a software issue. Please compare an ICS based GT-N7000 with a Jelly bean 4.1.2 based GT-N7000 to know the difference. Earlier, the two volume settings were functioning effectively but now the preset equalizers are not at all effective. The advanced settings inside the Custom settings are of no use at all. It makes no difference at all. Earlier my Galaxy Note was a piece of asset to me, but now I started hating my Note after the update. If you are not prepared to accept and acknowledge these nagging problems, then please suggest a way to go back to ICS 4.0.4, which was functioning pretty well for me. Please do not offer your stock replies to me. I am an advanced user of smart phones and I have shifted from Nokia from Samsung because of their stock replies and ill-motived suggestions instead of rectifying the software issues. I suggest the expert team should compare the ICS based GT-N7000 with Jelly Bean based GT-N7000 to exactly know and experience the nagging issues mentioned by me above. That is why I requested Samsung to test these issues threadbare and come out with a solution. My handset and the headphones absolutely do not have any hardware issues. It was functioning extremely well with ICS 4.0.4. Expect Samsung to come out with software update to resolve the issues.

    • If you get Jelly Bean OTA update, try to re-flash it manually with original factory image. I had some issues with my Samsung Galaxy Nexus with OTA update, but all solved after I manually flash it.

      I can’t give you more specific answers since I have never used a original Galaxy note with Jelly Bean.

      After hearing all these, my best suggestion is go back to Android 4.0.4 ICS.

  5. lisa santiago says:

    I have a Droid4 and the battery life with JB is now GREATLY DIMINISHED and it takes FOREVER TO CHARGE,…and without sleep mode I can’t conserve anymore…why couldn’t they leave well enuf alone?

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