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New
MacBook Pro a Technological Advancement
Unibody
design coupled with the world's most advanced notebook battery design
makes for lighter, longer-running portables.
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By Timothy Arends
"The
MacBook Pro family really is quite a remarkable engineering achievement
and is the result of hard work and innovation driven by this obsessive
attention to every detail," said Jonathan Ive, Senior Vice President of
Product Design in a video on Apple's site. "This is amply evident in
the enclosure. "
Traditionally notebooks are made from multiple
parts, which adds size and weight and opportunity for failure. The
great breakthrough for Apple was to replace all those parts with one
part called the unibody. Apple found a way to make the notebook
fundamentally thinner, lighter, and with a degree of fit and finish
never even dreamed of before.
Apple decided the only way it was
possible make that one part was to machine it out of a single piece of
aluminum. This material is ideal because it combines the thinness and
lightness required for a notebook, a great strength-to-weight ratio,
and great options from a fit-and-finish perspective.
The
process starts with a solid block of aluminum. It goes through an
extrusion process (similar to making pasta), then through
nine
separate milling operations that bring it down to the thinnest, most
finely detailed part with all the features needed to assemble the new
MacBook Pro.
This machining allows a level of precision that
is completely unheard of in the industry because, done correctly, it
enables an assembly process that is simple enough that it can be done
right every single time.
In addition to the sophisticated
unibody enclosure, Apple's new notebooks have achieved notable advances
in battery design and longevity.
 Bob Mansfield, Senior Vice
President of Mac Hardware, found battery redesign one of the
biggest opportunities for advancement in the MacBook line.
Apple
designed the longest-lasting batteries ever, running in web browsing
and text use up to seven hours on the 13 and 15 inch models and up to
eight hours on the 17 inch model--on a single charge. What's more,
depending on use and configuration, they can be recharged up to 1000
times, more than three times the number of charges for a typical
notebook battery.
To make efficient use of battery space,
according to Dan Riccio, Vice President of Product Design, every
millimeter in a laptop computer counts. The challenge in designing a
bigger, longer lasting battery is figuring out where to put it. The
design for a removable battery found in most laptops means a lot of
wasted space used for structure, mechanism and even removable doors. By
embedding the battery, Apple was able to create a notebook with a much
bigger battery and a much longer life without sacrificing small size or
weight.
Many computer makers put cylindrical batteries in their
laptops, similar to ordinary AA batteries. With a cylindrical shape, a
lot of space is wasted because of the unused volume between the
batteries. Apple, on the other hand, creates custom-shaped batteries
that more efficiently fill the available space.
Apple employs
scientists and engineers dedicated to battery development, and the
company uses lithium polymer technology in it's notebook batteries. The
process starts with a tissue-like foil. This is coated with an active
material of advanced chemical design that stores energy in the
batteries. The coated foil sheets are wound into an electrode
roll, which is cut and pressed to a precise shape according to Apple's
exacting dimensions.
Another important strategy in increasing
battery life is the concept of adaptive charging, which reduces the
wear and tear on the battery as it is charged. The typical laptop
battery charging scheme is to charge lithium ion cells at a constant
voltage until they're full, which can wear out batteries prematurely.
Apple's strategy is to add a sophisticated chip which monitors the
battery at each one of the individual cells and reports back on the
state of each to the system, which adjusts the recharge state
accordingly.
Apple has put a lot of thought into how users can
get a full day's worth of work out of a single battery charge while
increasing the number of charge cycles a battery can accept at the same
time, and has hit upon a convergence of technologies that have helped
it achieve that goal.
View MacBook
Pro prices and stats at MacMall
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It's an open-and-shut case: The Mac Pro is as beautiful on the inside
as it is on the outside.
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