Last week I finished up the review of the Sony VAIO professional thirteen, that delivers wonderful battery life compared to most different laptops that we’ve tested – granted, it’s conjointly one amongst the primary Haswell ultimo systems we’ve tested similarly. Shortly when the review denote, Microsoft formally discharged the Windows eight.1 update. Battery life is outwardly one amongst the areas that’s purported to improve with Windows eight.1, or a minimum of that’s the idea. I reran the battery life tests (only with the inner battery, so as to stay testing time manageable), and here square measure the results:
I’m getting to got to rerun the Medium take a look at (after the battery finishes recharging nonetheless again), simply to verify the result, because it shows a rather vital Martinmas drop compared to my initial testing. (Update: a second run confirms it; i do not apprehend why, however the Medium take a look at is certainly obtaining worse battery life currently.) As for the opposite 2 tests, they’re conjointly down compared to the sooner results, however here we tend to see a a pair of drop by the serious take a look at and solely a zero.4% drop by the sunshine result. A margin of error of ~2% is traditional for battery life testing, therefore in need of retesting multiple times I’m willing to decision the sunshine and serious results a tie.
The main takeaway here is that anyone expecting Windows eight.1 to dramatically improve battery life relative to Windows eight is probably going getting to be thwarted. Note that we tend to do take a look at with the LCD at a relentless two hundred nits, therefore optimizations that put off the show sooner instead of later may still have a bearing, however in comparison equivalent settings we tend to didn't notice any improvement on the VAIO professional thirteen.
Far more vital in my expertise are going to be the laptop computer BIOS/firmware. I’ve been human action with Intel recently within the hope of serving to to enhance matters, as I even have a couple of Haswell-equipped laptops that square measure failing to deliver the expected battery life. If all goes well, Intel can bang some OEM heads and we’ll get BIOS updates which will improve our battery life.
Frankly, I’m astonished that some corporations still seem to not place within the necessary time/effort to deliver smart battery life. Clevo is maybe my biggest gripe at once, and we’ve dinged them on battery life for as long as I will keep in mind. With the Haswell Clevo notebooks that I even have at once (P157SM and W740SU), it seems neither one is victimization the deeper sleep states (C6/C7) for the C.P.U. package – and within the case of the P157SM, it’s not even victimization the package C3 state. The C.P.U. cores square measure properly victimization C7, however the package isn't. that will not be the sole item holding back battery life, however a minimum of it seems to be a part of the puzzle.
In short, think about this a warning shot across the bow of the laptop computer makers. It’s time to affix the trendy world, and failing to place unused devices to sleep or to require advantage of deeper sleep states with hardware isn't acceptable, particularly on a laptop computer. i do not wish software package hacks to show off the show additional quickly, or drop the brightness to a hundred nits in direct sunlight; i need real enhancements. Besides raw battery life, i am going to a minimum of be checking to visualize that future laptops use all the obtainable C-states (on the cores similarly because the C.P.U. package) once running off the mains.
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