Battery Life

The Galaxy Note 8.0 features an integrated (non-removable) 4600mAh battery. Assuming 3.7V chemistry we’re looking at 17Wh, a 4.4% increase over the iPad mini. The display is higher resolution and the CPU cores run at a 60% higher frequency than they do in the iPad mini (not to mention that there are twice as many cores). Although the GPU is slower, ARM’s Mali 400 doesn’t appear to be as power efficient as PowerVR’s SGX 543MP2. To make a long story short, the Galaxy Note 8.0 might have a slightly larger battery than the iPad mini, but the platform itself should consume (potentially significantly) more power.

To quantify (we love numbers), we once again turn to our own battery life tests. We’ll start with our 2013 web browsing battery life test, first introduced in the iPhone 5 review:

We regularly load web pages at a fixed interval until the battery dies (all displays are calibrated to 200 nits as always). The differences between this test and our previous one boil down to the amount of network activity and CPU load.

On the network side, we've done a lot more to prevent aggressive browser caching of our web pages. Some caching is important otherwise you end up with a baseband/WiFi test, but it's clear what we had previously wasn't working. Brian made sure that despite the increased network load, the baseband/WiFi still have the opportunity to enter their idle states during the course of the benchmark.

We also increased CPU workload along two vectors: we decreased pause time between web page loads and we shifted to full desktop web pages, some of which are very js heavy. The end result is a CPU usage profile that mimics constant, heavy usage beyond just web browsing. Everything you do on your device ends up causing CPU usage peaks - opening applications, navigating around the OS and of course using apps themselves. Our 5th generation web browsing battery life test should map well to more types of mobile usage, not just idle content consumption of data from web pages.

Web Browsing Battery Life (WiFi)

The Galaxy Note 8.0 delivers about 13% lower battery life than the iPad mini in our test. The drop isn’t tremendous, but it’s just beyond the point of being noticeable.

Video Playback Battery Life (720p, 4Mbps HP H.264)

Video playback is much worse. The Note 8.0 shaves off 23% from the iPad mini’s battery life on a single charge. Apple has traditionally done a great job of implementing low power video decode, it seems like Samsung needs to do some work here as even the larger Note 10.1 suffers.

3D Battery Life - GLBenchmark 2.5.1

Finally, for the true worst case scenario, we have our GLBenchmark 3D battery life results.

3D battery life is one area where the old Galaxy Tab 8.9 actually leads everything else, the reason being that its hardware is so slow it's simply incapable of drawing all that much power compared to newer, faster tablets. Here we get a good feel for the lower bound in the Note 8.0's battery life - a bit under 4 hours. The 8 ends up with ~ 40% less time on a single charge compared to the iPad mini.

The Note 10.1 does a lot better here simply due to its larger battery (offset by a larger display, but benefitting from a lower power SoC).

Charge Time

Samsung bundles a fairly standard 5V/2A USB charger with the Note 8.0. The Note 8.0 takes a hair under 4 hours to charge from empty to full (no current draw at the wall). This is comparable to the iPad mini.

Charge Time in Hours

WiFi, GPS Performance Performance: Upgrading from a Galaxy Tab 8.9
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  • Sleepingforest - Thursday, April 18, 2013 - link

    I'm really excited about the multi-window support! I find myself switching between two apps (internet and note-taking) far too often on my phone--it's really annoying, even with multitasking tweaks and whatnot. Reply
  • gnx - Thursday, April 18, 2013 - link

    If you're into rooting and installing custom ROMs, AOKP with "last app" in the navigation bar is excellent for that kind of multitasking.

    But as an 8.9 user, I really wish Samsung or someone would build a under 1lbs, 1080p HD, 8.9 tablet. The form factor of 8.9 makes it like a slim ipad4, while the under 1lbs makes it possible to hold with one hand, and of course, 1080p HD in 8.9 would not only look great, it'd make note taking (with an S pen or any other stylus) much more accurate.

    Long ago, supposedly LG's consumer research showed the people felt the 8.9 as the ideal size. LG came out with the first one, and Sammy followed suit with a svelt Galaxy Tab 8.9. That was two years ago. Now, Amazon's 8.9 Kindle erred on being a tad too heavy (1.3 lbs), while this Galaxy Note errs on being too cramped. If Sammy would quite chasing Apple (and making a 8.0), and just go its own way with an upgraded 8.9.
    Reply
  • Sleepingforest - Sunday, April 21, 2013 - link

    Thanks for the advice, but I'm actually an iPhone user (jailbroken!) It's starting to feel a bit slow though, and I don't know if I'm going to stick with Apple. I am pretty heavily invested in the app ecosystem here, but I'm sure an Android promotion will come up at some point with a Google Play giftcard as incentive.

    I'll keep your advice in mind though, as I'm looking pretty closely at the HTC One!
    Reply
  • enmass90 - Monday, April 22, 2013 - link

    If you're a jailbroken iPhone user, download a tweak called "accelerate". It will make iOS feel alot snappier, and you can choose how fast you want it! Reply
  • TaylorSandler - Thursday, April 18, 2013 - link

    Love my job, since I've been bringing in $5600… I sit at home, music playing while I work in front of my new iMac that I got now that I'm making it online.(Click Home information)
    http://goo.gl/dg9Kt
    Reply
  • Donniesito - Friday, April 19, 2013 - link

    Why don't we have the ability to report posts as spam? Can we please get rid of these absurd comments? Reply
  • nerdstalker - Sunday, April 21, 2013 - link

    I kinda like them; they are mostly funny. Especially when they are posted in bold.; easier to spot and read. Ha! :) Reply
  • DanielShaw - Wednesday, May 15, 2013 - link

    There is no doubt that Galaxy Note 8 is much more sophisticated and advanced than many other similar devices and Samsung products. It is very intuitive, quick and functional. It is perfect for using it on the go, when you need to take quick notes, write down some ideas, search for information, etc. Since I bought it few days ago, I am not stopping being impressed by this device.

    See my full feedback and review of Galaxy Note 8:

    http://www.squidoo.com/Samsung-Galaxy-Note-8-table...
    Reply
  • martie01 - Friday, May 17, 2013 - link

    I'd agree. Samsung note 8 is certainly a tremendous device, even despite the rather high price. Reply
  • Gadgetguy52 - Friday, June 21, 2013 - link

    I agree. Since I got the Note 8.0, I haven't been annoyed with not being able to open up an additional window. Reply

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