iPad mini Review
by Anand Lal Shimpi & Vivek Gowri on November 20, 2012 6:10 PM ESTBattery 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.
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:
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:
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.
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.
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EnzoFX - Tuesday, November 20, 2012 - link
Just give the 7" the 2048 res treatment, and then double the 10" iPad's resolution once again! lol.Seriously though, it involves support on their end for some software changes, hope they follow through. I doubt they would want this mini to always (even the near future) have this resolution.
Zink - Wednesday, November 21, 2012 - link
LCDs in phones are at 440 ppi with some manufacturers testing almost 500 ppi so with a big investment from Apple, doubling the Retina (264 ppi) iPad's resolution would probably be possible within 1 or 2 years. It wont happen though because of reduced battery life and reduced performance on current hardware for a very subtle gain in image quality. It will probably be 5 years before we see 10 MP+ tablets because battery life and light weight are more important. Mobile SOCs also just aren't fast enough. Even with DDR3 next year the iPad will still only have twice the memory bandwidth it had for the iPad 3, not enough to even attempt 4x the pixels. Getting enough memory bandwidth for double Retina in an iPad will require next generation DDR technology or an even wider memory system which won't be viable anytime soon.jecastejon - Wednesday, November 21, 2012 - link
I just hope the "resolution war" on tablets and phones to be over at 400 dpi, but it should be already over at 350 dpi.From the human sight point of view it is basically over. The extra power and resources should go to better frame rates, better graphics and battery life.
Today there are a few ridiculous measurements or also detrimental technology examples going higher every day like the dynamic contrast on TVs or the megapixel war on tiny consumer sensor cameras. They are misleading advertisement.
500 dpi is useless to 99.9% of humans at almost all ages even if the technology allows to go further and further.
Dribble - Tuesday, November 20, 2012 - link
It's going to age very fast with that ancient cpu, and only 512mb of memory. Basically the moment the mini 2 comes out with a faster cpu this one will be forgotten and apps won't run on it.tbh seems like a rip off to me. It says something that the main reason I read for buying it is the shape of the screen - you've got to love that a lot to buy something that is all the other ways worse then it's much cheaper competition.
marcolorenzo - Tuesday, November 20, 2012 - link
Did you look at the benchmarks? I'm not sure I would say that it is "all the other ways worse then it's much cheaper competition."As a HTC One X user, I can tell you first hand the Tegra 3 isn't the sum of its parts, and the benchmarks that Anand provides proves that.
ltcommanderdata - Tuesday, November 20, 2012 - link
You actually anticipate developers will drop support for the iPad Mini "the moment" the 2nd generation is released? The 1GHz A5/A5X CPU is also used in the iPad 2 and iPad 3, while the slower 800Mhz A5 is used in the iPhone 4S and 5th gen iPod Touch which will both be on sale into 2014 given Apple's 3 year iPhone and 2 year iPod Touch sale cycles as they move down price tiers. The majority of iOS devices are A5 devices and will be for the next year or 2. The vast majority of apps still support 3rd generation devices and 4th generation device support is even higher. Apple's license agreement guarantees the iPad Mini will get iOS 7 and historically each device runs 3 major OS revisions over it's lifespan, so the iPad Mini will likely get OS updates into 2015. The chances of developers dropping support for 5th generation devices like the iPad Mini in the next year or 2 seem slim.Dribble - Wednesday, November 21, 2012 - link
You can think that if you like but 512mb of ram is already a limiting factor, and the cpu/gpu will start to be come one too as time goes by.This is the world of apple - if it's not new then it doesn't matter, and with the mini you are essentially buying something that's already 1 1/2 years old.
drx11 - Sunday, November 25, 2012 - link
Except its 512MB (megabytes, no mb or megabits) of RAM.... but I know what you are saying. I suppose you should have some concern, but then again Apple - at least for the last few years - has been the best at SoC and even my old arsed iPhone 3GS runs well with iOS 5. It could run iOS 6, though it wont have the best features ... so that should change your mind.Unlike Google/OEMs/phone carriers, Apple supports its hardware and you get more out of the hardware - even when the specs are not "as good" as the competition.
DeciusStrabo - Thursday, November 22, 2012 - link
CPU is still ok, GPU the same, but the 512 MB RAM is absolutely something that's a worry. It wasn't enough on my iPad 2 a year ago and it's very annoying in Safari if you have several tabs. And it will only get worse as time moves on. Adding another 512 MB RAM would have cost Apple basically nothing and made the product a lot more future proof (as far as it is possible in this fast-moving segment of a fast-moving industry).karasaj - Tuesday, November 20, 2012 - link
Will it blend?