Forscher der amerikanischen Stanford-Universität haben
eine Entdeckung gemacht, mit der Laptop-Akkus statt vier Stunden wie bisher bald 40 Stunden halten könnten.Die aufladbaren Lithium-Ionen-Akkus enthalten zusätzlich Silizium und können dadurch um das Zehnfache mehr
Ladung speichern.
Entwickelt wurden die neuen Akkus vom Assistenz-Professor Yi Cui und einigen Kollegen im
Bereich Material- und Ingenieurwissenschaften an der Stanford-Universität.
Cui zu der gemeinsamen Forschungsarbeit: "Das ist keine kleine Verbesserung, das ist eine revolutionäre Entwicklung." Und die ist folgende: Die Forscher haben einen Weg gefunden,Siliziumdrähte so in aufladbaren Lithium-Ionen-Akkus
einzusetzen, dass diese bis auf das Zehnfache mehraufgeladen werden können. Lithium-Ionen-Akkus kommen derzeit in Laptops, Handys, iPods oder
Digitalkameras zum Einsatz.
In der Zeitschrift "Nature Nanotechnologie"veröffentlichten Cui und die restlichen Forscher eine
Dokumentation zur ihrer Forschungsarbeit. Dort erläutert Ciu, dass die Leistungssteigerung der Akkus durch den Einsatz von Siliziumdrähten als Bestandteil der Anodeerreicht wird. Laut Dokumentation haben Silizium-Anoden theoretisch die höchste Lade-Kapazität und eignen sich
dadurch eigentlich sehr gut für Akkus. Dieser Umstand istschon seit langem bekannt. Allerdings hat das Material Eigenschaften, die es für den Einsatz unbrauchbar machen: Silizium dehnt sich aus, wenn es geladen wird und schrumpft bei Gebrauch wieder zusammen. Dieser Kreislauf sorgt für eine langsame Pulverisierung des Siliziums und damit wird die Lebensdauer des Akkus
deutlich verringert. Das Geheimnis des neuen Akkus: Das Silizium wird nicht
als Film oder als einzelne Partikel in den Lithium-Ionen-Akku eingebracht, sondern in Form von
Drähten. In dieser Form kann sich das Siliziumausdehnen und zusammenziehen, ohne Schaden zu
nehmen.
17.12.09
7 ways to make your laptop battery last longer
With the latest portable PCs, working on the move has never been easier, but laptops are still slaves to the National Grid.
You can do practically anything on a modern laptop, but their advanced features drain battery life to the extent that you can only get a couple of hours out of your laptop before it turns up its toes.
While battery life is a chief cause of mobile moans, it's possible to get significant improvements by simple good practice and a few software tweaks. To help you get the most from your laptop battery, here are seven easy ways to make it last longer.
1. Dim your screen
The screen is one of the most power-hungry parts of the laptop. It takes serious amounts of battery power to keep your display looking clear and bright. Saving this power is simply a question of turning the brightness down. The screen brightness button is usually located as a second function of one of the F keys, and is represented by a little sun symbol with up and down icons. To use it, just hold down the correct function key and then choose up or down.
2. Change power settings
Windows Vista comes with some great power features, which enable you to eke out the best performance when you're plugged into the mains, and optimise battery life when on the move. Type power options into the Start Search box and choose Power saver from the list. The Windows Mobility Center has more methods for saving battery life. These include settings for powering off the monitor and kicking into sleep mode more quickly.
3. Switch off Wi-Fi
One of the biggest battery sappers is the wireless networking capabilities built into most laptops. Wi-Fi drains the battery by constantly drawing power from the battery and, when not connected, looking for networks. When you're using your laptop away from the grid, the likelihood is you're away from wireless networks, so you can turn this device off. Many laptops have a function button that enables you to turn off the wireless adaptor manually to save yourself the unnecessary waste, but older laptops often don't have this. If this is the case, just go to the Control Panel, access the Network Connections menu and disable your wireless connection manually.
4. Turn off peripherals
Using USB peripherals can put a big drain on your system, because your motherboard has to power them, so unplugging everything saves juice. USB sticks, mice and webcams are common offenders, so copy all your information across and eject your devices as soon as possible, and put up with laptop track pads over your USB mouse. Many laptops have function buttons to turn off the built-in webcam, which drains the battery if given the chance.
5. Eject your disc drives
Having a disc spinning in the drive is a huge drain on resources, and many programs constantly do this. Simply eject your discs before you switch to battery power to gain vital extra minutes from your working day.
6. Invest in some hardware
Good practice can go some way to extending your battery life, but if you need to use your laptop throughout your working day, you're going to need some help. Most laptops come with a six-cell battery, but many manufacturers offer eight- or even 12-cell optional upgrades, which can double your power. The alternative to expensive laptop batteries are products such as the Philips Portable Power Pack, which gives you valuable extra hours for all your devices. The Philips is a compact battery unit that has adaptors for most laptops and mobile phones, which is portable enough to be placed in a bag and has enough capacity to double the length of your charge.
7. Disable features
Windows Vista has some handy built-in features, but many put demands on your system that are unnecessary when working on the move. Take the simple measure of turning off Windows Aero and the Windows Sidebar when you're on the move to make your laptop more efficient.
You can do practically anything on a modern laptop, but their advanced features drain battery life to the extent that you can only get a couple of hours out of your laptop before it turns up its toes.
While battery life is a chief cause of mobile moans, it's possible to get significant improvements by simple good practice and a few software tweaks. To help you get the most from your laptop battery, here are seven easy ways to make it last longer.
1. Dim your screen
The screen is one of the most power-hungry parts of the laptop. It takes serious amounts of battery power to keep your display looking clear and bright. Saving this power is simply a question of turning the brightness down. The screen brightness button is usually located as a second function of one of the F keys, and is represented by a little sun symbol with up and down icons. To use it, just hold down the correct function key and then choose up or down.
2. Change power settings
Windows Vista comes with some great power features, which enable you to eke out the best performance when you're plugged into the mains, and optimise battery life when on the move. Type power options into the Start Search box and choose Power saver from the list. The Windows Mobility Center has more methods for saving battery life. These include settings for powering off the monitor and kicking into sleep mode more quickly.
3. Switch off Wi-Fi
One of the biggest battery sappers is the wireless networking capabilities built into most laptops. Wi-Fi drains the battery by constantly drawing power from the battery and, when not connected, looking for networks. When you're using your laptop away from the grid, the likelihood is you're away from wireless networks, so you can turn this device off. Many laptops have a function button that enables you to turn off the wireless adaptor manually to save yourself the unnecessary waste, but older laptops often don't have this. If this is the case, just go to the Control Panel, access the Network Connections menu and disable your wireless connection manually.
4. Turn off peripherals
Using USB peripherals can put a big drain on your system, because your motherboard has to power them, so unplugging everything saves juice. USB sticks, mice and webcams are common offenders, so copy all your information across and eject your devices as soon as possible, and put up with laptop track pads over your USB mouse. Many laptops have function buttons to turn off the built-in webcam, which drains the battery if given the chance.
5. Eject your disc drives
Having a disc spinning in the drive is a huge drain on resources, and many programs constantly do this. Simply eject your discs before you switch to battery power to gain vital extra minutes from your working day.
6. Invest in some hardware
Good practice can go some way to extending your battery life, but if you need to use your laptop throughout your working day, you're going to need some help. Most laptops come with a six-cell battery, but many manufacturers offer eight- or even 12-cell optional upgrades, which can double your power. The alternative to expensive laptop batteries are products such as the Philips Portable Power Pack, which gives you valuable extra hours for all your devices. The Philips is a compact battery unit that has adaptors for most laptops and mobile phones, which is portable enough to be placed in a bag and has enough capacity to double the length of your charge.
7. Disable features
Windows Vista has some handy built-in features, but many put demands on your system that are unnecessary when working on the move. Take the simple measure of turning off Windows Aero and the Windows Sidebar when you're on the move to make your laptop more efficient.
TOSHIBA Satellite A80-116 laptop akkus
Li-ion 8800mAh Kompatibler Ersatz für TOSHIBA Satellite A80-116, Satellite A80-117 Laptop Akkus mit 1 Jahr Garantie in Deutschland
Akkutyp:Li-ion
Spannung:10.8V
Kapazität:8800mAh
Gewicht: 725.76g
Abmessungen: 206.60x91.40x26.40mm
Org. Preis:€ 135,36
Jez. Preis:€87,99
Jetzt sparen Sie: €47,37
SAMSUNG R55-CV03 laptop akkus
Li-ion 4400mAh Kompatibler Ersatz für SAMSUNG R55-CV03, R55-CV05 Laptop Akkus mit 1 Jahr Garantie in Deutschland
Akkutyp:Li-ion
Spannung:11.1V
Kapazität:4400mAh
Gewicht: 453.6g
Abmessungen: 204.05x48.10x21.48mm
Org. Preis:€ 88,44
Jez. Preis:€57,49
Jetzt sparen Sie: €30,95
HP COMPAQ 360483-004 laptop akkus
Li-ion 4400mAh Kompatibler Ersatz für HP COMPAQ 360483-004, PB994A Laptop Akkus mit 1 Jahr Garantie in Deutschland
Akkutyp:Li-ion
Spannung:10.8V
Kapazität:4400mAh
Gewicht: 453.6g
Abmessungen: 203.60x53.60x20.40mm
Org. Preis:€ 77,60
Jez. Preis:€50,44
Jetzt sparen Sie: €27,16
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