Have you ever run out of battery power on your mobile PC during a meeting or a class? Have you worried about running out of power while waiting to meet with a client? Have you asked yourself how much longer your battery will last? Sufficient battery life is a persistent challenge for mobile PC users. Microsoft Windows XP, though, offers several ways to help maximize the battery life of your mobile computer.
In this article, I'll discuss how to take advantage of Windows settings to manage power more efficiently. I'll also introduce some non-software related tips that you can use to extend battery life. Optimize your power settings
The display and hard disk on your mobile PC are the two biggest consumers of battery power. By customizing the existing power schemes in Windows XP you can extend your battery life. Windows XP provides a number of power schemes, which are predefined collections of settings designed for different environments and circumstances.Windows includes two power schemes that were created specifically for mobile PCs.
The Portable/Laptop power scheme minimizes the use of power to conserve your battery, but adjusts to your processing needs so that the system speed is not sacrificed.
The Max Battery power scheme minimizes power use but does not adjust as your processing demands change. You should use Max Battery only in situations that require minimal processing, such as reading documents and taking notes in a meeting.
Click Start, and then click Control Panel.
In Control Panel, verify that you're in Category view, and then click Performance and Maintenance.
In the Performance and Maintenance window, click Power Options.
On the Power Schemes tab of the Power Options Properties dialog box, click the arrow under Power schemes, and then click Max Battery.
Click OK.
Take advantage of low-power states
Windows XP provides two battery-saving sleep states: standby (which is like snoozing) and hibernation (which is like deep sleep).Standby
In standby, your display and hard disk turn off, and all open programs and files are saved in random access memory (RAM)?your computer's temporary memory—rather than to the hard disk. Information stored in RAM is cleared when the computer turns off, so it's a good idea to save your work before placing your system in standby mode. Otherwise, you may lose data if you lose power, you swap batteries, or your system crashes.
Standby is particularly useful when you're using your mobile PC intermittently during the day. For example, when driving between clients' offices during the day, put your computer on Standby to maximize the life of your battery and maintain quick access to open programs, files, and documents.
In standby, your battery consumes only a small amount of power. When you want to use your computer again, it wakes up quickly, and your desktop is restored exactly as you left it.
To put your computer on standby:
Click Start, and then click Control Panel.
In Control Panel, verify that you're in Category view, and then click Performance and Maintenance.
In the Performance and Maintenance window, click Power Options.
In the Power Options Properties dialog box, click the Advanced tab.
Under Power buttons, click the arrow, and then click Standby.
Click OK.
In hibernation, your computer saves everything to your hard disk and then shuts down. When you restart the computer, your desktop is restored exactly as you left it. Hibernation uses less power than standby, but it takes a bit longer to resume.
To manually put your computer in hibernation:
Click Start, and then click Control Panel.
In Control Panel, verify that you're in Category view, and then click Performance and Maintenance.
In the Performance and Maintenance window, click Power Options.
In the Power Options Properties dialog box, click the Hibernate tab.
Under Hibernate, select the Enable hibernation check box.
Click OK.
Adjust screen brightness
You can also conserve battery by reducing the screen brightness. To adjust your screen brightness, refer to the instructions from your mobile PC manufacturer. Every computer is slightly different, but you can usually use a combination of keys, a function key, or a software tool to dim the screen.Even better than dimming the screen is blanking it completely when you're not using your computer. You can further minimize power consumption by reducing the amount of time the computer is idle before the screen goes blank.
Turn off wireless
Another significant drain on your battery power is your wireless card. You should turn off your wireless device when you're using your mobile PC but are not connected to a wireless network. You can either remove your Wi-Fi card or press the manual hardware button on your computer if you're using a Centrino-based mobile PC. Refer to the instructions from your mobile PC manufacturer to learn where the manual hardware button is.Additional power saving tips
In addition to adjusting power settings to maximize battery life, consider the following tips to minimize power consumption when you're away from electrical outlets.
Turn off scheduled tasks. If you use scheduled tasks to run programs or scripts, or if you schedule other tasks to occur automatically at a preset time, specify that these tasks won't be performed when the computer is running on battery power.
Keep the use of tools in the notification bar to a minimum. Try to minimize your CPU's usage. Look at the notification area of the taskbar and close any tools (or utilities) that are not necessary. Often, these tools are installed on the computer when you first receive it. The notification bar, shown below, is on the bottom right of your computer desktop.
Limit power-intensive activities. Avoid watching a DVD or playing online games on your mobile PC when you need to conserve battery power.
Add memory. You can minimize the reliance of Windows on virtual memory and reduce power consumption by adding memory to your mobile PC.
Carry at least one spare battery. Buying an extra battery is a good investment for your peace of mind. Battery prices vary widely. You can significantly increase the power available to you if you're willing to splurge a little. Contact the manufacturer of your mobile PC to find a replacement battery.
Charge your battery often. When you're on the road, be sure to carry a power cord and plug your computer in whenever you have the chance.
Completely drain nickel-based batteries. If you're using an older laptop (at least 3 years old) with a nickel hydride battery, be sure to completely drain it and recharge it monthly to ensure that it will hold its charge. Most newer mobile PCs use lithium ion batteries, which don't need to be drained to maximize their capacity.
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