Power management Lets you select a balance between power consumption and Wi-Fi adapter performance. The Wi-Fi adapter power settings slider sets a balance between the computer's power source and the battery.
Use default value: (Default) Power settings are based on the computer's power source. Manual: Adjust the slider for the desired setting. Use the lowest setting for maximum battery life. Use the highest setting for maximum performance.
Windows XP* Setting Power Management for an Intel WLAN adapter installed in a system with Microsoft Windows XP* can be misleading if the user overlooks the information in the Description box.
The power management setting can actually be thought of as power savings mode. There are six levels of power savings,. An advantage of disabling power savings mode is that it provides the greatest Wi-Fi network performance.
To access the Power Options: Select Start | Control Panel. Select Power Options. Select Change plan settings (next to the power plan). Select Change advanced power settings. Select Wireless Adapter Settings (you may need to scroll down to see this). Open Power Saving Mode. Select the options for On battery and Plugged in.
Power options: Maximum Performance: Adapter is set to maximum transmit power level. Low Power Saving: Slightly lower transmit power than maximum performance. Medium Power Saving: Offers slightly less power saving than maximum power saving. Maximum Power Saving: Sets the adapter to the lowest transmit power.
Setting power options to Maximum Performance while on battery can cause battery power to discharge faster.
Video: How to change the wireless power settings on Windows 7*