Applelta SENSAATIOMAINEN akku!

With batteries, size matters. The greater their capacity, the longer they run. The challenge is that the real estate inside a notebook computer is limited. Millimeters matter. Most computer makers deal with this by jamming as many lithium-ion cells as they can into a removable battery pack, adding bulk to the system. There are a few problems with this approach. First, lithium-ion cells have fixed cylindrical shapes (they look like traditional AA batteries), and they dictate the thickness of the notebook. Also, valuable space is wasted in the cavities between the cells. To increase battery life without increasing the size and weight of our notebooks, Apple scientists and engineers used lithium-polymer. This type of battery can be customised to fit perfectly inside extremely thin enclosures, like those of the MacBook, MacBook Air and MacBook Pro.

With the new 17-inch MacBook Pro, Apple engineers went further. To make its lithium-polymer battery even bigger, they looked for extra space within the enclosure. And they found it in an unlikely place — the removable battery itself. Removable batteries take up a lot of space. They require infrastructure that takes up space. The batteries themselves have to be encased in bulky plastic housings to withstand the wear and tear of handling. Those housings take up more space. And the notebook enclosure has to include mechanisms for a separate battery compartment, such as latches and a door. All those parts take up space that could be used for the battery itself.

To give the 17-inch MacBook Pro the biggest battery possible without adding size or weight, Apple engineers eliminated all the parts required of a removable battery and embedded the battery into the notebook. This created enough space for a battery with 40 percent greater capacity — one that can run for up to 8 hours on a single charge.

Charging can have a dramatic effect on a battery’s lifespan. Most notebooks charge their batteries at a constant rate, no matter what the battery’s condition. This can wear out a battery prematurely. And it’s exactly what a new technology developed by Apple, called Adaptive Charging, helps to prevent.

The battery in the new 17-inch MacBook Pro is made to be smart. It’s built with a chip that talks to each of its cells to determine their precise condition. The chip shares this information with the computer. And the computer uses an advanced algorithm to make delicate adjustments to the charging current, varying it to suit the changing conditions inside the cells. This Adaptive Charging reduces the wear and tear on the battery and gives it a much longer lifespan than ever before — up to five years.

But charging is only part of the story. The battery innovations in the new 17-inch MacBook Pro go deeper — into the very chemical makeup of the battery. Apple’s team of scientists and electro-chemists developed advanced chemistry that extends the battery’s lifespan even further.

The lifespan of a battery is measured in recharges. One recharge is a complete charge and discharge of a battery’s energy. A recharge doesn’t necessarily occur every time you plug in your notebook; many partial charges can add up to a single full recharge. The typical battery delivers about 200 to 300 recharges before its capacity declines to approximately 80 percent. At that point the battery still works, but its performance is diminished. Thanks to the breakthroughs of advanced chemistry and Adaptive Charging, the battery in the 17-inch MacBook Pro can go through up to 1000 recharges before it reaches 80 percent of its original capacity — more than three times the lifespan of typical notebook batteries.

A longer-lasting battery is a more environmentally friendly battery. The removable batteries in most notebooks are designed to be replaced. You use them for a year or two, then get a new one. It’s a process in which lots of batteries are used up and discarded in landfills. Because the battery in the new 17-inch MacBook Pro lasts up to five years, it uses just one battery in the same time a typical notebook uses three. In addition, it’s free of the BFRs and PVC found in the battery compartments of other notebooks. And to help ensure that batteries are disposed of in an environmentally responsible way, Apple offers a battery take-back program in 95 percent of the countries in which it does business.

A breakthrough battery for a breakthrough notebook. With the new 17-inch MacBook Pro, Apple engineers have taken the radical step of eliminating the removable battery, and have embedded a battery with a capacity great enough to run for up to 8 hours. They’ve developed advanced chemistry and a charging method that extend the battery’s lifespan to more than 1000 recharges. And they’ve done it all in the world’s thinnest and lightest 17-inch notebook, giving you more freedom and mobility than ever. It’s a battery that just works. And keeps on working for years and years. Which is just what a battery is supposed to do.

Johan sitä saa the Tietokoneisiin! :D :D :D :D :D :D