Using Powertop to Lower System Power Usage by adapterlist.com

adapterlist.com - Using Powertop to Lower System Power Usage

Ever wonder what’s sucking the life out of your Linux laptop’s battery or contributing to higher electric bills in the server room? Check out Powertop, a tool for profiling a system to see what is using the most power.

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Powertop was developed a few years ago to help profile systems and see what could be done to make Linux better at power savings. It was aimed primarily at laptops, as many folks would install Linux on a laptop and then find out that battery performance was far worse under Linux than Windows.
You don’t even need to run Powertop to benefit from it. Some of the most common power-gulping culprits are listed on the LessWatts.org website. Many of these have been fixed in the upstream projects that caused unnecessary wakeups (like ntp waking up every second, or Pidgin checking every 5 seconds to check on idle time). Something as simple as a blinking cursor can cause a wake up every few seconds, and additional power consumption.
But you might want to get a look at what’s going on under your system’s hood specifically. Powertop should be packaged for all major Linux distros, though it might not be installed by default. After installing Powertop, start it up as root (or using sudo) by running powertop. Now you’ll see an output that’s very similar to top but showing the top causes for wakeups. It also displays the ACPI estimate for power usage; at the bottom of the output, it will show suggestions (if any) to improve power performance — or it will notify you of processes preventing the disk from going into powersave mode.
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Some of the problems uncovered by Powertop are going to be beyond your control. While Powertop gives several tips that you can follow, like tuning the kernel to reduce wakeups, sometimes it just reports that an application is doing something silly. However, unless you are going to re-write the application yourself, not much can be done about it. You can file a bug though, assuming it’s egregious yet sane enough to fix.
But Powertop will also provide suggestions on how to tune the kernel or make other changes that will provide better power performance. For example, Powertop suggests increasing the timer for writing to disk to decrease the number of wakeups.

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You might not get mad power gains from using Powertop, but you can get some useful tips and see what it is that keeps the kernel going even when you’re not doing anything on the computer. It’s also an interesting look at what’s going on behind the scenes, in terms of which applications are writing to disk and when (and to what files). In using Powertop over a period of time, I found that (as expected) USB devices are one of my top sources for power consumption, as well as Firefox — even when it’s just sitting in the background doing nothing. This information comes in handy at various times. For example, if you’re at a conference and trying to conserve battery power, you might want to not have Firefox running all the time.
Spend a few hours with Powertop and you’ll learn much more about what goes on behind the scenes. You might even be able to boost your battery life and be a little greener to boot!
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Top 10 Tips to Extend iPod touch Battery Life – Wholesale Electronics News

Top 10 Tips to Extend iPod touch Battery Life – Wholesale Electronics News
- http://www.wholesaleeshop.com.au
Apple rates the iPod touch’s battery as offering 36 hours of music or 6 hours of video playback on one charge. But sometimes you need more juice and less charge. So, if you’re looking for ways to get the most life out of your iPod touch battery, try these 10 tips.

iPod-Touch

1. Reduce Screen Brightness
You can change the brightness of your screen. Needless to say, the brighter the screen is set at, the more battery it requires. Keep the screen more dim to conserve more of your battery.
2. Turn on Auto-Brightness
The iPod touch’s built-in light sensor can be your ally in extending the battery life of your touch. The when auto-brightness is turned on, the sensor will automatically adjust the brightness of the screen based on how much light is nearby. This means that in brighter settings, the screen will be dimmer, using the ambient light to aid seeing the screen. In this way, auto-brightness can help extend the life of your battery.
3. Keep WiFi Off
Unlike the iPhone, the iPod touch can only connect to the Internet when there’s an open WiFi hotspot nearby. Because of this, iPod touch users are less likely to drain their batteries by trying to connect to the web all the time. Some may keep WiFi turned on at all times in hopes that an open hotspot will appear, but that’s a sure way to drain your battery life and will only work well in some places. So, unless you’re using WiFi right now, keep it turned off.
4. Turn Off Location Services
The iPhone has a GPS device built into it for extremely accurate directions and other location data. While the iPod touch offers location data, it’s not using GPS, and thus isn’t quite as powerful or accurate. In fact, the iPod touch’s location services require WiFi to be enabled to work (and we just talked about WiFi, right?). Still, using these location services, your touch can offer you an approximate location and walking or driving directions, among other features. But, since it and WiFi need to be on simultaneously to work, if you’re not using Location Services immediately, and don’t plan to right away, turn them off and save some power.

5. Turn Data Push Off
The iPod touch can be set to automatically suck email and other data down to it or, for some kinds of accounts, have the data pushed out to it whenever new data becomes available. Of course, both features require the iPod to be connected to a network via WiFi, something we’ve already established drains battery on its own. When you add this second feature, you’re draining even more power. So, unless you’re waiting for a super-crucial email, turn push off to extend your battery’s life (though with push off, you’ll need to set your email to check automatically or do it yourself).
6. Fetch Email Less Often
The less your iPod touch accesses a WiFi network, the less battery it uses. So, set it to check your email accounts less often. Try checking every hour or, if you’re really serious about saving battery, manually. Manual checks means you’ll never just have email waiting for you, but you’ll also stave off the red battery icon.
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7. Auto-Lock Sooner
You can set your iPod touch to automatically go to sleep – also known as Auto-Lock – after a certain amount of time. The sooner it sleeps, the less power it uses. Try setting Auto-Lock to 1 or 2 minutes ot save the maximum juice.
8. Turn off Equalizer
The iPod touch has a built-in equalizer feature that dynamically adjusts the adjust of the music its playing to increase bass, decrease treble, etc. Because this adjustment happens on the fly, it requires extra battery power. Turn it off to save battery. Turning it off means you’ll end up with a slightly modified listening experience – and the battery savings might not be justified for the true audiophile – but for those hoarding battery life, it’s a trade worth making.

ipad

9. Do Less-Battery-Intensive Things
Not all ways to save battery life involve settings. Some of them involve the way you use your iPod touch. Things that require it be on for long periods of time, or use a lot of system resources, suck the most battery. Of course, some of these things also make the iPod touch the most fun, like movies and games from the App Store. If you need to conserve battery, limit your use of battery-intensive apps.
10. Buy an Extended Life Battery
If all else fails, just get more battery. A few accessory makers offer extended life batteries for the iPod touch (just make sure not to accidentally buy one designed for the iPhone – they look very similar!). If you need so much battery life that none of these tips help you enough, an extended life battery is your best bet. With one, you’ll get days more standby time and many hours more use.
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Hands-on with Synaptics’ ClickPad Series 3.0 for the future Of Touch pad
- http://www.wholesaleeshop.com.au

Building a better clickpad

When you get right down to it, laptops only consist of a few key parts as far as user interface is concerned. Keyboard, screen, speakers–and, of course, the touch pad. With multitouch tablets and smartphones changing the interface landscape drastically, it’s quickly becoming a multitouch world, and computers are the devices playing catch-up. Synaptics, makers of most multitouch touch pads used today, have a next-generation clickpad in development that hopes to close the gap quickly. Called the Series 3.0 Clickpad, it’s a wider, button-free click surface that’s the successor to clickpads seen in some current Windows laptops.
When it’s all boiled down, the ClickPad Series 3.0 offers several significant improvements:

• More accurate finger recognition. The 3.0 Clickpad has 10-finger independent recognition on its capacitive surface, something more akin to what devices like the iPad have. Synaptics’ image-sensing technology on the touch pad also is far more accurate at locating the shape of the finger being used, and whether it’s a flat surface or something resembling a palm. This allows an override of the touch technology when a palm is accidentally placed on the surface when typing.
• Multifinger gestures. Apple’s clickpad has had this for years, but the new Clickpad allows up to four-finger gestures and a wide variety of gestures to clear the desktop, browse back and forth between Web pages, and more accurately pinch-to-zoom and rotate. Four-finger swiping brings up a clever “deck” of open windows, which can be easily navigated between.

Top-clicking

• Clicking anywhere. Current clickpads work like a giant lever, angling downwards from a hinge on the back. Apple’s clickpads don’t click well at the back end, and neither do equivalent Windows clickpads. Synaptics’ next-gen model is a large surface that can click down at any part of the pad. Sometimes the concept model felt a little loose, but in future pads it’ll be nice to engage in some top-clicking.
• Scrybe. Synaptics is working on a gesture-based vocabulary for other clickpad-initiated controls. Some may involve drawing a question mark to begin a search, for instance. We welcome more features, but a gesture vocabulary will need cross-application support and could get confusing to master. We’re reminded of Graffiti for the Palm Pilot; hopefully, it won’t be as confusing.

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Keep Your iPad In Perfect Health With System Manager

Have you ever wanted a diagnostic tool for the iPad?  A tool that would let you monitor system information much like you can on your laptop or desktop?  We found one in the app store recently and found it extremely useful.  This is an app that is helpful and useful if you want to keep tabs on all your system resources.

iPad System Manager

You can manage all of the processes on your iPad.  This is important if you are experiencing any problems on your iPad, apps are loading slowly, you are getting memory errors, or you might want to check the battery life.  Perhaps you want to boost your battery life or perform maintenance on your iPad?  System Manager is an iPad system info app that helps see right inside your iPad and keep it running in top shape.

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 This iPad system info app is more than just a way to view system processes. It is one tool you will want to have around if you download a lot of apps or ever experience problems.  It’s also a tool you will want to have around so you can check certain functions like memory, disk usage, and more.

---

iPad System Info App by www.goodlaptopbattery.com.au

Here are the features you get with this iPad system info app:

• Memory.  Show full memory status and boost device speed by increasing free memory space
• Process.  See all running background applications and system processes
• Disk.  Disk space status showing free and used space
• Battery.  Full battery maintenance function and information
• System.  Get all system, network and CPU information

With this iPad system info app you can not only get vital information about your iPad but you can perform system maintenance and keep your iPad in top running shape.
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How to Revive a Dead Laptop Battery - battery care tips by batteryfast.co.uk

How to Revive a Dead Laptop Battery - laptop battery care tips by quality battery store:www.batteryfast.co.uk

Bring a seemingly dead laptop battery back to life, to a usable state, though not quite as new. It could be almost as good as a laptop battery and a lot cheaper than a universal external laptop battery. With a freezer, in the same place you your peas and frozen TV dinners, you could back a dead laptop battery.

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Just follow the instructions below and save money. It costs you only the time it takes to completethe list below. So do yourself a favor and do it yourself.

1. Set a dead laptop battery in a completely sealed plastic bag.
2. Place the bag and battery in the freezer between 11-14 hours.
3. Remove the bag from the freezer and allow the battery to room temperature after taking out of his pocket, which is very important.
4. If your laptop battery is still wet with a dry cloth.
5. Place your laptop batteries once dead back to your laptop.
6. Now fully charge your battery then let it discharge fully. Repeat this step at least 3-4 times.
7. Your dead battery, should be much more usable, if not fully recovered.

Well, you do not remove the batteries for a fraction of the cost of alternative methods. So, do not condemn your laptop battery in the trasham but for the moment. With this method, you will see savings between 30-90% of the cost of replacement laptop battery. This inexpensive alternative method is to replace the batteries in the battery with a new brand. You must first remove the laptop battery from your computer. You must then carefully open the battery, a screwdriver should do the job. Inside is with multiple batteries and a plurality of wires are facing. AWord of warning when a battery is leaking proceed with caution. If you are not sure then do not continue.

Now you need to write down exactly the type of laptop battery that you have, and I repeat exactly what it is connected (cable) to each other. Just to make sure your old batteries, you could use a millimeter or a similar device to test to see what they have to state if this leaking then touch dispose of them properly and then make sure you wash yourhands thoroughly and you’re back in business. After confirming that they are actually dead laptop batteries need to order some spare batteries. These provide the replacement have a higher value than the old mah, only slightly. If your laptop batteries with new ones put in the correct position and replace the wiring so you can make the necessary soldering. Make sure you use the appropriate safety equipment and check all connectionscorrect. Once your laptop batteries in power and all confirmed, you should test your millimeter, to ensure they are working as expected.

Put the laptop battery and close properly. Install the laptop battery in your laptop and enjoy your laptop back to life.

You should consider the limited list below, which could also benefit from any of the above methods.

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Dell Laptop Battery FAQ | batteryfast.co.uk – UK quality battery store

Dell Laptop Battery FAQ | batteryfast.co.uk - UK quality battery store

Q	How long does a Dell laptop battery last? When should I consider replacing mine?

A

All rechargeable batteries wear out with time and usage. As time and cumulative use increase, the performance will degrade. For the typical user, noticeable reduction in run time generally will be observed after 18 to 24 months. For a power user, reduction in run time generally may be experienced prior to 18 months. We recommend buying a new Dell laptop battery when the run time does not meet your needs.

Q	How should I choose between two batteries with different Watt hours (Whr) available on one system?

A	Higher Watt hours (Whr) on the same system under the same operating conditions will generally deliver longer battery run time. For example, if you compare the same system, running the same applications, the 53Whr battery would provide approximately 65% more run time than the 32Whr battery.

Q	How long am I able to use my Dell laptop on a fully charged battery?

A

Many factors affect the amount of time that a portable computer battery can deliver power before it must be recharged. These factors include the configuration (processor, memory, etc.), types of applications being run and display brightness.Dell uses industry standard benchmarks for battery run time claims. For more information on battery run times and benchmarks, the white paper, "Understanding Battery Life in Portable Computers" is available at: http://www1.us.dell.com/content/topics/global.aspx/vectors/en/2005_batterylife?c=us&cs=555&l=en&s=biz

Q	How do I charge my Dell laptop battery?

A	The battery charges in the laptop when the laptop is connected to an AC power source via the AC adapter.

Q	How long does it take for a Dell laptop battery to fully recharge?

A	The charge time varies depending on the system. If the system supports ExpressChargeTM , the battery typically will have greater than 80% charge after about an hour of charging, and fully charge in about 2 hours with the system off.

Q	What is ExpressChargeTM ?

A	For a system advertised as having the ExpressChargeTM feature, the battery typically will have greater than 80% charge after about an hour of charging and fully charge in about 2 hours with the system off.

Q	Should I totally discharge, then recharge my Dell laptop battery occasionally to make it last longer?

A	No, discharging and charging does not increase the life of a Lithium Ion technology battery.

Q	Can a Dell laptop battery be "overcharged"?

A	No, the battery is designed to stop using the charger when it reaches full charge.

Q	When docked or AC adapter is plugged into a wall outlet, am I using my battery charge?

A

No.

Q	Does Dell sell external battery chargers?

A	Dell offers a Datamation battery charger for large institution customers. The charger has 16 charge bays to charge batteries for Latitude D500/D505/D510/D520/D600/D610 laptop systems. The product can be found at Dell.com here:

Q	Is it easy to install a battery?

A	Yes, very easy. First, make sure all open files are saved. Next, either attach the AC adapter directly to the laptop or set the system to "hibernate" mode or shut off. Release the latch on the current battery, and simply install the replacement battery.

Q	What is a modular bay battery?

A	In some laptop systems Dell offers a battery that can be used in the optical drive media bay (DVD/CD drive bay). This enables the use of two batteries, potentially extending the available run time.

Q	If I install a modular bay battery, are my primary and modular bay batteries working at the same time to power my laptop computer?

A	No, the modular bay battery is used first, then the system automatically switches to the primary battery. This is a deliberate design to allow the most amount of run time to remain in the primary battery in case the modular bay battery is removed and replaced with an optical drive.

Q	For what use is the strip of LED lights on my battery?

A

Most Dell batteries have an LED indicator that allows users to see how much run time and how much overall battery life are available at the touch of a button. To check battery charge, press the button and the number of lights that appear will tell you charge status. If all lights appear, you have a fully charged battery. Each light that appears accounts for approximately 20% charge. To check the battery health, press and hold the status button on the battery charge gauge for at least 3 seconds. If no lights appear, the battery is in good condition and approximately more than 80 percent of its original charge capacity remains. Each light represents incremental degradation. If five lights appear, approximately less than 60 percent of the charge capacity remains, and you should consider replacing the battery.

Q	What does Dell recommend for battery storage for a long period of time?

A

When storing for more than 4 days these guidelines can better preserve the life of your battery: Do not store batteries for long periods plugged into or attached to any power source. This includes AC adapters and laptop security carts plugged into an outlet. Laptop batteries, including those stored in laptop systems, should maintain an Operational Storage Temperature of 0° to 35°C (32° to 95°F). Batteries may be stored in the laptop or outside of the laptop. Charge batteries before storing. The recommended charging time should not exceed 1 hour. Typically, this should charge the battery to between 80% and 100%. (Some discharge will take place over time. Stored batteries are expected to discharge 10-15% over a four month period, for your information.)

Q	Are there restriction with taking lithium-ion batteries on planes?

A

Effective January 1, 2008, the Department of Transportation (DOT) through the Pipeline and Hazardous Materials Safety Administration (PHMSA) will no longer allow loose lithium batteries in checked baggage. These batteries may continue to be packed in carry-on baggage. For more information: http://www.tsa.gov/travelers/airtravel/assistant/batteries.shtm

Q	How should I choose the right battery for my new system?

A

When choosing a battery, the main quality that you need to consider is the amount of energy that can be stored in a battery. This is measured in Watt- Hours (Wh). For longer runtime per charge, choose a battery with a greater Wh rating If you want. Choose. Trade off. Longer runtime Higher capacity . Higher cost . Heavier weight Lighter weight Lower capacity Lower runtime Lower cost Lower capacity Lower runtime Note: When used under the same conditions, a lower capacity battery will wear out faster than a higher capacity battery because it has to be charged more often.

Q	What is a battery slice?

A	Some Dell laptops have a battery that attaches to the bottom of the system, providing additional runtime for the laptop.

Q	Does Dell recommend the use of a non-Dell replacement battery?

A

Dell recommends that you replace your battery with a genuine Dell battery obtained from Dell. When using a genuine Dell battery, you can be assured that you have a battery that has been designed, qualified and manufactured to strict Dell quality standards. For safety and performance always use a genuine Dell battery purchased from Dell. Dell does not evaluate the design or check the quality of non-Dell replacement battery packs. The quality and safety is unknown when using such batteries.

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