Microsoft W840DI manual Battery Maintenance, Power Consumption, Users Guide, Page

User's Guide Battery

2.4Battery Maintenance

To maintain the battery pack's maximum capacity, you should occasionally let the notebook deplete its battery power completely before recharging.

To carry out a complete depletion of the battery, disconnect the AC adapter and let your notebook consume the remaining battery power. To speed up the depletion, use the HDD as much as possible, and the LCD should be set as bright as possible. When the battery is empty, wait for the notebook to cool down (especially the battery). The temperature should be within 15-25°C (59-77°F). Then insert the AC adapter to recharge the battery.

2.5Power Consumption

The Windows™ operating system has incorporated the latest state-of-the-art ACPI (Advanced Configuration Power Interface) power management methodology. In order to fully utilize the power of your battery packs, it would be a good idea for you to spend sometime to acquire a basic understanding of the power management concept from your operating system.

In Windows™ Operating Systems, you can go through Power Options of the Control Panel according to the version of Windows™ Operating System the notebook applies. We shall not describe them in details.

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