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How to Save Battery Life in Windows 7

Microsoft recently released a new 14-page whitepaper entitled "Windows 7 Power Management" to outline the power management technologies in Windows 7 that reduce power consumption. For those curious as to how exactly Windows 7 will use less power, this is your answer. For those who just want the quick scoop.

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1) Idle Resource Utilization
This is one of the most important power management technologies because idle time is a significant portion of the time a computer is turned on. Idle efficiency in Windows 7 is improved by reducing resource utilization and enabling hardware to go into lower power states during long periods of Apple macbook battery inactivity. This includes the processor, disk, memory, and network activity on the computer. To demonstrate just how much power can be saved, CPUs consume nearly 0 watts when idle, but up to 35 watts at full power.

2) Trigger Start Services
Services were usually started automatically right after startup and would run in the background waiting for an event to occur. In Windows 7, certain services are only started when triggered by an event such as device insertion or an IP change. This makes it unnecessary to have services starting all the time and reduces the amount of background processes, then reducing your Dell D5318 battery.

3) Enhanced Processor Power Management
Windows 7 will include device driver support for the latest PPM technologies for Dell 75uyf Dell C1295. PPM allows Windows 7 to choose the appropriate processor performance state depending on the load and scale performance accordingly.

4) Adaptive Display Brightness
Microsoft says that the average display is set to turn off after 10-15 minutes of inactivity in Dell Latitude D620 Battery. Often times however, there are shorter periods of inactivity in between. To save additional power, ADB defines will allow dimming the display. ADB can also utilize hardware sensor technology to adjust display brightness accordingly to ambient light.

5) Low-Power Audio
Windows 7 will support the latest Intel HD Audio low-power specification, which introduces a new power state known as D3Cold to IBM laptop Battery. This is the lowest unresponsive power state that a codec can go into. It can also further conserve power when an audio device is not in use. Windows 7 also supports selective suspend technology that extends to USB audio-class devices such as microphones and web-cams.

6) Timer Coalescing
Modern processors reduce power consumption by taking advantage of idle time between executing instructions, but many PPM technologies require a minimum amount of idle time before obtaining any net-power savings. Timer Coalescing increases the average idle period by letting the Windows kernel combine periodic software activity.

How to Check My Laptop Battery

A laptop battery powers a laptop. This gives people the option of using laptops when without needing to access a power outlet. Laptop batteries have a life expectancy of one to three years or 200 to 400 charges. Additionally, over time, the efficiency of the battery may decrease, leaving a user with less battery time than he previously had. If you think your battery may be dying or losing efficiency, it can be easily checked.

Ensure the laptop is turned off. Plug the AC power adapter into an electric outlet. Insert the circular end into the appropriate hole on the side of the laptop.

Leave the laptop off. Allow the AC power adapter to fully charge the battery for 12 hours. During this time, do not use the laptop or turn it on. This can slow down the charging of the battery.

Remove the AC power adapter by gently pulling it out of the hole on the side of the computer. Turn the laptop on by pressing the "Power" button. Note what time you turned the laptop on.

Allow the laptop to use the battery power until the battery dies and the laptop turns off. Note what time the laptop dies. During this time, you can use your laptop if desired.

Compare the start time to the end time. If the battery does not last for at least an hour, the battery efficiency is decreasing and/or the Sony laptop battery may be dying and should be replaced. The battery should be tested routinely to compare efficiency levels. Once the efficiency significantly decreases, the battery should be replaced.

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