Battery Life and Charging

The iPad mini features an integrated 16.3Wh battery, easily smaller than the 43Wh unit in the iPad 3/4 but even smaller than the 25Wh used in the iPad 2. Given that the mini has roughly the same internals as the iPad 2,4, but with a substantially smaller battery, you can expect a corresponding decrease in battery life. The display is also smaller, which should reduce some of the power requirements a bit.

We've started running our new smartphone web browsing battery life test on tablets as well. If you missed its introduction in our iPhone 5 review, here's a bit about the new test:

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.

AnandTech Tablet Bench 2013 - Web Browsing Battery Life

The mini actually outlasts the 3rd gen iPad in our heaviest WiFi web browsing battery life test, but the 4th gen iPad's move to a 32nm SoC solves that problem. Under load however both the new iPad and the mini are fairly close in terms of battery life.

We haven't yet rerun our new test on all of the tablets, so we turn to our older 4th gen test to provide some additional reference points:

Web Browsing Battery Life

If we look back at our older test we get good perspective on everything. The iPad 2,4 still remains the king of single battery tablets, and the mini just barely makes it over 9 hours of use on a single charge. The mini still lasts long enough for it to be more of an all-day device than a notebook.

Our video playback test remains unchanged from previous tablet reviews. Here I'm playing a 4Mbps H.264 High Profile 720p rip I made of the Harry Potter 8 Blu-ray. The full movie plays through and is looped until the battery dies. Once again, the displays are calibrated to 200 nits:

Video Playback - H.264 720p High Profile (4Mbps)

Apple's video decode hardware implementation has always been stellar, as a result the mini manages to do very well here. At over 11 hours of video playback on a single charge, the mini is only bested by some of its larger iPad brethren. The iPad 2,4 remains insanely awesome here.

Our final cross-platform battery life test is the new GLBenchmark 2.5.1 Egypt HD test. Here we have a loop of the Egypt HD benchmark, capped to 30 fps, running on all of the devices with their screens calibrated to 200 nits.

AnandTech Tablet Bench 2013 - 3D Battery Life

I no longer have a 45nm iPad 2 so I don't have results for it here, but the combination of the small 1024 x 768 display and 32nm A5r2 silicon gives the mini better battery life than the iPads equipped with a Retina display. The iPad 2,4 continues to offer amazing battery life here.

The GLBench battery life test gives us a reasonable minimum for the iPad mini's battery life, with the video playback test giving us a good maximum. You can expect to see 6.4 - 11.2 hours out of a single charge from the mini.

The mini comes bundled with a 1A charger identical to what you get with an iPhone 5 or a 5th gen iPod Touch. Using the new Lightning connector it'll take about 4 hours to complete a charge on the iPad mini.

GPU Performance Camera - Photo and Video Analysis
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  • teiglin - Tuesday, November 20, 2012 - link

    +1 to wanting an updated Galaxy Tab 7.7. I have the P6810 and it's definitely the best tablet ever.

    Sadly it's probably not going to happen. The 7.7 barely made it to the US and when it did, it was stripped of its phone functionality and cost $700 from VZW. I don't have any basis to speak to its international sales, but they didn't include it in the list of incoming JB updates, which doesn't speak well to its popularity.
  • ltcommanderdata - Tuesday, November 20, 2012 - link

    Well hardware variety is a key Android advantage. Samsung introduced the Galaxy S III mini in the 4" form factor of the iPhone 5. If the iPad Mini shows demand for a ~8" form factor, I don't see why Samsung wouldn't want to introduce a new Galaxy Tab 7.7 to tap into that market.
  • chleuasme - Tuesday, November 20, 2012 - link

    > The second option would be to pick a new resolution that wasn't an integer multiple of the current one [...] Picking a non-integer multiple of those resolutions would force Apple to do some scaling and filtering to hit the new resolution, which could reduce quality. Apple does this on the MacBook Pro with Retina Display to enable higher resolution modes. To maximize image quality however, Apple renders the desktop offscreen at 4x the resolution and then scales down to fit the panel. There are obvious performance concerns here as well.

    If you want to make an analogy with the highest resolution on the rMBP, you have to take a 1536x1152 screen (i.e. 75% of the retina iPad res, just as the physical 2880x1800 pixels of the rMBP15 screen represent 75% of the 3840x2400 res) and scale down the 2048x1536 resolution on the physical pixels of the screen.
    So, the 4x part of the work would be done at the same price as on current retina iPad (and the same on your example: for 1600x1200, you're not go to do 1024x768 -> 3200x2400 -> 1600x1200 but 1024x768 ~> 2048x1536 -> 1600x1200). Still need to scale down after, though.
    But sub-pixel rendering probably make things better on OS X compared with what would happen on iOS.
    No talk about AutoLayout?
  • Formul - Tuesday, November 20, 2012 - link

    I'm not sure why the general unavailability of tablet app versions for the android is not even mentioned in the summary as the big quality tablet software library is one of the most convincing points on top of the build quality to spend the extra $130 on the iPad mini. And no its not about OS preference or investment into an ecosystem, its about the general machine abilities and usability - if its more like a big phone or a small tablet.

    Hardware wise and depth wise the review is spot on though, don't get me wrong! Great job, guys!
  • Cristian Sorega - Wednesday, November 21, 2012 - link

    I see this comment posted all the time and don't get it. What is the unavailability or lack of tablet app versions on Android?
    This is a serious question because I might miss something obvious.

    I have 2 android tablets and used the iPad 1 and iPad 2 which I wanted to buy as I am quite invested in the Apple system thanks to my iPhones. The lack of any way to transfer photos from a drive to the iPad and also back was why I looked at Android tablets to begin with. Trying to upload photos on blogger was also a painfull experience, which worked perfect on Android.

    I am using quite a few apps and have found all apps I was using on iOS on Android (or good/better substitutes). Unlike on iOS I never need to worry about getting HD or non HD versions for apps and all look perfectly fine. Where iPhone apps need to be re-scaled 2x on the iPad and look blurry, I never had this problem on Android and all apps look perfectly fine.
    Also most apps take advantage of the higher resolution and display size without problem. Sure, some apps could benefit of having a better interface on the tablet but these apps usually use the same interface on the iPad.

    So your comment strikes me as someone who has not really used Android tablets in the last year or maybe I misunderstood something.

    On another note, all the benchmarks prove nothing really as in real life most tasks would be done faster and easier on an Android device and I have yet to see a proper real-world review of these devices.

    Take for example some basic tasks I do with my device:
    - Checking the weather: On Android I can now see it without unlocking my device on the lockscreen with a widget, or on the homescreen with a widget. On iOS I need to find and start the weather app, sure the weather app will start faster due to the better benchmark performance than it might on Android but on Android I don't need to bother.
    - Reading news using Pulse (or any other news App): iOS devices start the app very fast but then need to start downloading the latest data once the app is started. On Android the app might start a few ms slower but the latest updates have been done in the background so I can actually read the news right away.
    - Attaching a file to an email you reply to: iOS only allows to attach pictures to emails you reply to since iOS 6 with a long press, before it meant hitting reply, closing the email app, opening the picture viewer, finding the pictures, hitting select, then copy, closing the picture viewer, opening the mail app and hitting paste. On Android you just click attach and select any app you want to use, then simply select the file you want and it can be any file type not just emails.
    - Uploading pictures: The iPad is much faster at importing pictures via the Camera connecting kit than the Transformer for example but I can't choose the location or decide if I want to import both JPG and RAW files, nor can I import anything that is not under the DCIM folder. On Android I simply browse the file system and decide where to copy from an paste to, plus I can do this both ways so it allows to create a backup when travelling without a computer.
    - Freeing up space: On Android I can delete any type of file or app from anywhere on the system, on iOS I can not delete any music or pictures I imported through itunes so am stuck with it till I get back to a computer.

    These are all things I do on a regular basis or have struggled with and I would like to see in a real world review because there the iPads would not look very good, great build and everything.
  • akdj - Wednesday, November 21, 2012 - link

    Wow...where to start?
    I'm both an iOS and Android user--iPad 4/iPhone 5 and Nexus/Xoom/Note (original) owner. I'm an iOS developer--and working on learning development with Android. Right there is an excellent place to start! Really cool 'coding' programs. I'm using Codea, but there are man...including the new drag n drop SkripKit...or Pythonista, which allows direct export to XCode!
    Productivity---I'm not a big fan of Docs2Go. It's what I use on Android...because it's what's available. In comparison...the iOS offering of Pages, Numbers, and Keynote...this is huge for me, especially with the plethora of Apple products we are trying to keep sync'ed
    Creative work---My day job is my audio/video production company....been at it for 21 years now and this past summer, we did 132 weddings and class reunions. The iPad/Mac combo has completely revolutionized my business. Between using dJay for ceremonies (where you need only 3 or 4 songs), Garage band for recording ceremonies live--Real, true Korg synths, excellent video production facilities with Avid and iMovie...a LOT more tools for YOUR photography!!!! There are a couple decent editing apps in the Play Store---but they pale in comparison to iOS offerings. Drawing apps...cookbooks, games, games and more games!!! The list TRULY goes on and on and on...
    There absolutely is a gaping hole in 'tablet optimized' apps in 'Droid-Land'. My fingers are crossed---but for now, if you truly want to be productive--at least in creative work, there truly is NO comparison.
    Sorry---not sure how you've not seen this owning both platforms AND being a photog. Not even hard core Android fans or sites would argue this...especially in the tablet world---we are rooting for more development in this sector
    J
  • Cristian Sorega - Thursday, November 22, 2012 - link

    I still fail to see why Android lacks tablet optimized apps, all apps run fine on a tablet.
    Are there apps on iOS that would be good to have on Android, sure there are and probably more than the other way around but for me I have all apps I need and all work fine on a tablet so there is not issue with optimization.
    For productivity and Office apps you should try Polaris office as I find this to work well but if Office is a priority I would simply get a Windows RT or 8 tablet and use the real deal.

    As for your comment "a LOT more tools for YOUR photography!!!!".

    - I have not tried or bought every app in the Apps store but there is no easy way to view a picture 1:1 without it having been re-scaled by iOS so this is a big issue. I have not found an app that can browse pictures and can show me EXIF information, Histogram or any other shooting information.
    - I can not create a simple subfolder to organize my pictures during travels, a major issue for me or maybe I just can't see how to do this.
    - I can not separate JPGs from RAW files, nor can I rename a file.
    - No way to view 2 pictures side by side.
    - Can't backup my pictures without a computer to another drive or SD card.
    - Not possible to resize pictures for quicker upload.
    - Posting a picture on Blogger and changing the size it appears is a nightmare.
    - Impossible to access any pictures not found in the DCIM folder nor can I access pictures at home on my NAS for viewing or editing.

    All this I can do with either standard pre-installed software or use Photo Mate, Photo Editor and so on. There is also Photoshop Touch available if I want to use layers.

    Don't get me wrong the proper iPads (I don't think the mini servers any purpose) can be quite useful despite being limited by Apple for no real reason. But having used tablets for travelling since they were known as UMPCs the iPad simply does not allow me to do what I need while traveling where both the transformer and Nexus 7 works just fine, the transformer even better than a netbook.

    Having more software available is never a bad thing though so I hope to see more on Android since it's the more useful OS because it allows more freedom. Having said this, there is certainly no shortage of tablet apps for Android and most things work just as well if not better.
  • DeciusStrabo - Thursday, November 22, 2012 - link

    Firstly, it's a iPad Mini review, so Android things don't figure that much into it.
    Secondly, it's getting better every day. There are tablet-aware Apps for most purposes I use tablets for - RSS reading, browsing, Comic reading, Twitter, Facebook, G+, Music, Photo Viewing...
    They might not always be the official Apps (Twitter's and Facebook's offerings are a joke on both Android and iOS), but they are quality Apps doing a great job on tablets.
  • rakez - Tuesday, November 20, 2012 - link

    chrome is my favorite for desktop but, it blows on tablets. you will see android tablets score better simply by using a different browser. boat browser will run circles around chrome.
  • marcolorenzo - Tuesday, November 20, 2012 - link

    I just bought an iPad mini a few days ago and I'm loving it. My cousin's iPad now looks absolutely huge in comparison. The small form factor feels like the way it should've been the whole time. I don't care if it doesn't fit into my pockets, my pockets are for my phone and wallet. Someone previously said that if they're gonna carry it in a bag then they might as well get the normal iPad. I disagree because the small form factor doesn't just apply to portability, it also applies to your experience whilst carrying it. When holding the mini, I literally feel like I'm holding a small notepad. It's brilliant.

    I'm in no way an Apple fan (there are several reasons I dislike them in fact), having stopped using any Apple products since about a year ago, but I have to say, they really know what they're doing when considering their products' usability. When the iPhone 5 was released, I said to myself, "Damn, they did it again". Why? Because I have a HTC One X and as much as I love the big screen, it just isn't as practical as the "slightly longer, but same width" iPhone 5. They came up with a way to increase the screen size whilst maintaining the usability. Typical Apple. Same as the mini. There's a reason it's not as small as the Nexus 7. I saw the Nexus 7 and I kept thinking that I would never use it. Compared to my phone, it's not THAT much bigger, certainly not a big enough leap to make carrying both devices at the same time worthwhile in my opinion. The mini however, even though it's only slightly bigger, manages to cross over to the whole-other-device category. Of course, this is just my opinion, but for my money, the iPad mini is certainly worth the extra cash.

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