It’s the holy grail of any laptop user who spends most of the day out of the office.

Yes, thinner and lighter laptops are a blessing. But how about a notebook that will run all day without recharging? When will we be able to hit the road but leave the AC adaptor at home?

The answer to that question is “today”, depending on the price you’re prepared to pay and the compromises you’re willing to make (see sub-section below).

Within the next few years it won’t be an issue. The march of technology in computer chips and other components will make all-day computing a trait of almost every laptop.

“The challenge for us is to bring all-day  dell xps m1330 battery  life to the mainstream so that you take the laptop to work and leave the power supply at home,” says Mooly Eden, the general manager of Intel’s Mobile Platforms Group.

“But all day means different things to different people. For me it might be eight hours, for you it might be 10 hours. And we need to do even more than that, because as the laptop gets older, the battery life will slowly get lower. We need to deliver 10 to 12 hours without the charger. And we will be able to do that, because all-day battery life is not just possible, it is inevitable.”

Making notebooks better is what Eden does. Through his revolutionary work creating Intel’s Centrino laptop technology, the foundation of the Core line of processors, sony vaio vgn-fz430e battery  Eden is considered the father of modern mobile computing.

The Core i3, Core i5 and Core i7 chips run faster than any previous generation of Intel silicon, while drawing less power. And even that extra speed is being channelled into eking out extra battery life.

If you divide the laptop’s typical working day into tiny slices of time, most of them are spent being idle. More processing muscle means the notebook can do the heavy-lifting faster, allowing it to return to the low-power idle state more quickly. The more time it spends there,  hp elitebook 2530p battery the longer the battery lasts.

Eden calls this feature “hurry up and get idle” and it’s enhanced by turbo boost modes that further accelerate the processor for short but intense bursts – opening an email attachment or displaying a PowerPoint deck as thumbnails.

“The idea is wake the notebook up, do the job and then go to sleep again,” Eden explains. “If the chip does the job faster, it can go back to sleep sooner ibm thinkpad x60 battery , so you get better performance and you also get extended battery life. This is the real secret of energy efficiency.”

Yet the processor is just one part of the notebook. The screen is responsible for the largest portion of a laptop’s power drain, followed by the hard drive. Efficiencies in these are slower to come, with fewer breakthroughs and smaller leaps.

That said, notebook screens with LED backlighting draw less juice than the non-backlit models, while also providing a brighter picture.

And while solid state drives draw almost no power compared with the conventional platters of a hard disk, their high price and relatively low capacity makes them impractical for many notebook users. Seagate is leading the way to a new wave of hybrid hard drives that partner a high-capacity hard disk with solid state memory that automatically stores the most commonly used files and data asus eee pc 1000he battery.

There’s also a growing trend towards lightweight operating systems that allow email, music or movies and web-browsing without loading Microsoft Windows.

Typically based on Linux and embedded in a flash memory chip inside the laptop, they spring to life within seconds instead of the hard-disk hammering (and power-sucking) minute Windows often demands – which makes them a boon for shorter work sessions on the go  vgp-bpl8  battery .

Asus, Dell and HP all offer some form of “instant on” mode. Dell’s impressive Latitude ON implementation is bolstered by a tiny secondary processor and has inbuilt Citrix VPN support, making it possible to sidestep Windows for much of the day and let the notebook stride into Day 2 without an AC outlet in sight.

Once we hit true all-day computing for all laptops, this will be the target: a notebook that rocks around the clock, and then some.

How to join the all-day computing revolution

If you want all-day computing, here are some shopping hints.

Acer’s TimelineX family uses Intel’s ultra-low voltage Core i3, Core i5 and Core i7 powerplants to deliver upwards of eight hours in a slim and stylish chassis. The mid-range model with a generous 40-centimetre screen sells for $1600 but you can also get models in a near-netbook 30-centimetre screen size dell latitude d630 battery .

Option up your new laptop. In most business notebooks the standard battery can be replaced by a higher-capacity pack. Dell, HP and Lenovo also offer secondary batteries that replace the CD/DVD drive or attach to the notebook’s underside (sometimes called a “travel slice”) so you can hit the road with two full tanks of juice.

Look for laptops with fast-charge technology so you can top up the dell vostro 1310 battery  quickly by plugging into a power point for just half an hour. Also, place a premium on power-management software that can disable hardware such as the USB and network ports, fingerprint reader and even

CD/DVD drive, if they’re not being used. All those tiny voltage savings add up.

Squeeze the most out of your existing notebook by turning down the screen brightness and turning off 3G, Bluetooth and

Wi-Fi unless you need them. After a few years your laptop battery will be wearing down and running at much less than its original capacity. You can buy a new xps m1210 battery  but you’d be much better off to buy a whole new notebook.

There is a deafening, unearthly howl as if a jumbo jet was firing up its engines in London’s Dell XPS M1530 battery Albert Hall. On the screen in the control room a ghostly pinkish glow whips round the edges of the inside of the nuclear reactor. At its core it is 10 times hotter than the centre of the sun.

This, according to some physicists, is the solution to the  XPS M1210 battery  energy crisis a future with cheap, reliable, safe and nearly waste-free power. Today, after years of false starts and political wrangling dating from the Cold War, they will get their chance to make that dream a reality.
A US$14 billion project, called Iter, to build a prototype nuclear fusion reactor will be signed off in Brussels by the EU, Japan, China, South Korea, India and the United States.

The prospect of virtually limitless energy is not merely science fiction. The haunting, screaming growl of matter being smashed together at unimaginably laptop battery high speed is a daily occurrence at Jet in Oxfordshire, Southern England, an existing experimental fusion reactor. Jet is by far the biggest of the world’s 28 fusion reactors. It is the work of scientists here that has paved the way for the much bigger Iter, which, once the project is ratified in December, will be built in Cadarache in southern France.

Its advocates say nuclear fusion is the most promising long-term solution to the energy crisis, VGP-BPS8 VGP-BPS9 offering the possibility of abundant power from cheap fuel with no greenhouse gases and low levels of radioactive waste. But critics say the government is gambling huge sums of money 44% of the UK’s research and development budget for energy on a long shot with no guarantee of ever producing useful energy.

Last week British Prime Minister Tony Blair backed conventional nuclear  VGP-BPL8 battery SONY Vaio VGN-FZ battery power, saying in a speech to business leaders that not replacing Britain’s ageing nuclear power stations would be “a serious dereliction of our duty to the future of this country.”

He argued that only nuclear energy could prevent a huge hike in CO2 emissions once the current nuclear stations were decommissioned.

But while the debate over the future of conventional nuclear power continues, many physicists argue that fusion is the future. “Fusion works it powers the sun and stars,” said Sir Chris Llewellyn Smith, head of the UK Atomic Energy Authority. “In the second part of the century I’m optimistic it will indeed be a major part of the world energy portfolio.”

Unlike nuclear fission, which tears atomic nuclei apart to Dell Inspiron 6400 battery  release energy, fusion involves squeezing the nuclei of two hydrogen atoms together. This process releases a helium nucleus and a neutron plus huge quantities of energy.

The hydrogen fuel is part heavy hydrogen or deuterium, which can be easily extracted from water, and part super-heavy hydrogen or tritium, which can be made from lithium, a reasonably abundant metal.

The energy produced is truly colossal. The lithium in just one laptop battery and the heavy hydrogen from half a bath of water could provide enough energy for the average European for 30 years.

One of fusion’s big advantages over fission is safety. Firstly, there is no chance of a runaway meltdown as happened at Chernobyl.

If you stop applying the fuel or switch off the magnetic jacket that keeps the fuel in HP Pavilion DV9000 battery the reactor, the reaction just stops.

“It is very difficult to keep it running. It is like keeping honey on the back of a spoon,” said Mathias Brix, a physicist at Jet. Also, the quantities of fuel involved are much smaller than in fission reactors. Jet contains less than a gram of fuel, while Chernobyl had 250 tons. Lastly, the fuel and waste from the reactor is much less radioactive.

But although physicists think they understand fusion, harnessing it has proved extremely difficult. Research first began in the 1950s with claims that fusion would provide reliable power by the end of the century but even now scientists admit that a commercial application is at least 40 years away.
The problem is getting two  Pavilion DV9000 battery nuclei close enough to fuse and then controlling the reaction. This means putting in huge amounts of energy at the start to convert less than a gram of the fusion fuel into a super-hot gas or plasma. Hydrogen nuclei flying around at high speed in the plasma can then come close enough together to fuse.