$1,718.99
Final Words
There’s no other way to say this. If you care about battery life and portability at all, buy the new MacBook Pro. Go to the Apple store and buy one. While I only tested the 15” model, I’m guessing the 13” model should leave a similar lasting impression.
Ever since I first looked at the power consumption specs of Nehalem I thought it didn’t make any sense to buy a new, expensive notebook before Arrandale’s launch in Q4 2009/Q1 2010. While performance will definitely increase considerably with Arrandale, Apple just threw a huge wrench in my recommendation. The new MacBook Pro is near perfect today. If you need a new laptop now, thanks to its incredible battery life, I have no qualms recommending the new MBP.
The only thing you have to come to terms with is knowing that if the roadmaps still hold, that in 6 - 9 months there will be a much faster version of your notebook on the market; most likely at the same price. Combine the performance and power efficiency of Arrandale with the battery advancements in this new MacBook Pro and you’ll have one beast of a notebook.
Today I am more than comfortable saying that this is the best Apple notebook I’ve ever laid my hands on. The build quality is excellent, the base specs are solid and of course, the battery life. There’s no doubt that it could be better; toss in an SSD or drop the price even further, but as it stands the new MBP is an excellent choice if you’re looking for a Mac laptop.
Obviously, you can attain the same battery life with a cheaper notebook and one or two spare batteries. But there’s something to be said for increasing battery life by at least 50% without increasing the bulk or weight of the system.
I’m not sure there’s much else I can add other than Good Job, Apple.
The good news is, balance charging really works. Each cell is carefully charged by the microprocessor-controlled charging system such that they are kept at almost identical voltage, so you can be quite sure the packs will last through many hundreds of cycles.
The bad news is, Lipos are barely stable - they will happily (quickly) explode if overcharged, charged too fast, shorted, punctured or deformed, or if even you look at them funny. If people thought their laptop batteries fizzling into a fire were dangerous, then consider the Lipos to be small bombs. :)
How long will it last? Another Laptop or Notebook tends to lose or die after 1 - 2 year of use.
Would Apple, with it controller chip be able to prolong this lifespan?
I recommend those two reads:
This page (and whole site) is a good technical introduction:
http://www.batteryuniversity.com/partone-24.htm
This page is a TI application journal, well detailed and pictured:
http://focus.ti.com/lit/an/slyt322/slyt322.pdf
Have fun!
There are some anecdotal claims of exceptionally long battery life for other model laptops in this thread. I'd be interested in Anandtech publishing detailed comparison of battery life between many laptops using uniform benchmarks.
Also FYI for anyone considering a MacBook, you can save $100 if you qualify for the educational price (frankly, it's absurdly easy to get them at that price even if you don't). Also, you get a free iPod touch and printer after rebate. Sell them on Ebay and the base 13" MacBook Pro drops to $1099 - ~$180 - ~$50 = ~$870.
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The test...
Open Safari, open a window to news.google.com, display the page for 20s then refresh the content.
Close the window, open another window to www.cnn.com (it has flash animations changing all the time). Wait 30s, refresh page...
repeat every minute (so the Flash page is showing 2/3rd of the time)...
Test were done on brand new macbook pro, with original hard drive, wifi on (using 802.11n 5.8GHz, 3 metres away), bluetooth on, backlight set at 4 out of 16.
Screen was set to never goes to sleep nor display screen saver.
keyboard backlight was disabled and so was "Automatically adjust brightness".
All sharing services were disabled.
MBP 13", 4GB, 2.53GHz, battery capacity: 5605mAh:
First discharge: 6h45 (1)
After complete battery calibration: 7h30
MBP 15", 4GB, 2.66GHz, battery capacity: 6150mAh:
nvidia 9400: 7h35
nvidia 9600: 4h39
MBP 15", 2GB, 2.33GHz, Radeon X1600, battery capacity: 3450mAh
2h59 (2)
(1) Was my first test, when I realised the keyboard backlight was on, and it must have been a good ¾ of the time.
(2) This one has a battery with 318 cycles, so it may not mean much anymore.