The iPhone 5s Review
by Anand Lal Shimpi on September 17, 2013 9:01 PM EST- Posted in
- Smartphones
- Apple
- Mobile
- iPhone
- iPhone 5S
Battery Life
Brian did some excellent sleuthing and came across battery capacities for both the iPhone 5s and 5c in Apple’s FCC disclosures. The iPhone 5 had a 3.8V 5.45Wh battery, while the 5s boosts total capacity to 5.96Wh (an increase of 9.35%). The move to a 28nm process doesn’t come with all of the benefits of a full node shrink, and it’s likely not enough to completely offset the higher potential power draw of a much beefier SoC. Apple claims the same or better battery life on the 5s compared to the iPhone 5, in practice the answer is a bit more complicated.
Unlike previous designs, we’ve never had a half node shrink for an s-SKU. Both the iPhone 3GS and iPhone 4S stayed on the same process node as their predecessor and drove up performance. In the case of the 3GS, the performance gains outweighed their power cost, while in the case of the iPhone 4S we generally saw a regression.
The iPhone 5s improves power consumption by going to 28nm, but turns that savings into increased performance. The SoC also delivers a wider dynamic range of performance than we’ve ever seen from an Apple device. There’s as much CPU power here as the first 11-inch MacBook Air, and more GPU power than an iPad 4.
To find out the balance of power savings vs. additional performance I turned to our current battery life test suite, which we first introduced with the iPhone 5 review last year.
We'll start with our WiFi battery life test. As always, we regularly load web pages at a fixed interval until the battery dies (all displays are calibrated to 200 nits).
The iPhone 5s regresses a bit compared to the 5 in this test (~12% reduction despite the larger battery). We're loading web pages very aggressively here, likely keeping the A7 cores running at their most power hungry state. Even the 5c sees a bit of a regression compared to the 5, which makes me wonder if we're seeing some of the effects of an early iOS 7 release here.
The story on LTE is a bit different. Here we see a slight improvement in battery life compared to the iPhone 5, although the larger battery of the 5s doesn't seem to give it anything other than parity with the 5c:
Our cellular talk time test is almost entirely display and SoC independent, turning it mostly into a battery capacity test:
You can see the close grouping of the smaller iPhones at the bottom of the chart. There's a definite improvement in call time compared to the iPhone 5. We're finally up above iPhone 4S levels there.
Our Egypt HD based 3D battery life test gives us the first indication that Rogue, at least running fairly light code, can be more power efficient than the outgoing 5XT. Obviously the G6430 implemented here can run at fairly high performance levels, so I'm fully expecting peak power consumption to be worse but for more normal workloads there's no regression at all - a very good sign.
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qristheone - Monday, September 23, 2013 - link
If that was the case why can moto x be made in america and still make a profit? clearly apple is just raping people.robbie rob - Monday, September 23, 2013 - link
I don't know where you're getting your info, but in the last year only TWO handset makers made a profit: Samsung and Apple. All others broke even or lost money. Broke even means made money, but by the time you pay everyone plus cost of manufacturing you didn't lose money - but you didn't bank any either.http://www.neowin.net/news/analysts-apple-and-sams...
qristheone - Monday, September 23, 2013 - link
the real probelm with these test is ios 7 has open gl 3.0 and android has it only on 4.3. most of these phones do not have android 4.3 infact i doubt that any of these phones tested had 4.3 when running it.for those who dont know open gl is OpenGL (Open Graphics Library) is a cross-language, multi-platform application programming interface (API) for rendering 2D and 3D computer graphics. The API is typically used to interact with a Graphics processing unit (GPU), to achieve hardware-accelerated rendering.
NekoTipcat - Saturday, November 30, 2013 - link
Well yes iOS supports oGL ES 3.0 but only the iPhone 5s's gpu supports itSo the Real "Problem" resides on iOS 7 and iDevices as well
whatsa - Tuesday, September 24, 2013 - link
NiceAs its all about apps - lol
it would be more interesting to see the performance gain there
as it will be many years before you see a native 64bit majority in the store.
even though the tests bode well for the future everyday usage it will be the
more generic apps that define its performance "today"
lhlan - Wednesday, September 25, 2013 - link
Section on A7 dual core vs quadcore design: you emphasized the A7's power efficiency advantage (lack of proper power gating on quad-core parts), as well as performance neutral factor - two cores at full speed is not slower than quad-core at so-so speed! A reference to the CPU section of MotoX review was made to back-up this point.Closer investigation of the MotoX review shows different picture: while performance can be comparable at best, the argument on power efficiency is so in favour of quad-core! It says running two cores at full high speed requires "ton of voltage", while running four core at 1.2GHz doesn't need that much power, hence more power efficiency.
In the end, do we have empirical evidence as to which design (two vs. four) saves more power?
128bit - Thursday, September 26, 2013 - link
First time knows that IPhone 5s comes with 1570 MAh battery.Anand ur the best keep the good job
rogekk - Thursday, September 26, 2013 - link
may pick myself up one after reading this review coupled with is african view about the iphonehttp://techjaja.com/the-reviews/iphone-5s-review/2...
newandroidfan - Saturday, September 28, 2013 - link
Tired of reading big ass reviews? Never get the info you need the most? Read the full review of the iPhone 5s and iPhone 5c with Full phone specifications only here http://goo.gl/QrGSPoanxyandy - Monday, September 30, 2013 - link
Hmm! If this beauty is as good as it looks here, I'm afraid I won't even be considering the iPhone 5S! http://versus.com/en/sony-xperia-z1-mini-vs-apple-...Xperia Z1 Mini - same(ish) size, excellent features and hardware!