Operating time is significantly reduced when you perform operations including, but not limited to, the following:

Using optical drives.

Using wireless communications devices, PC Cards, Express Cards, media memory cards, or USB devices.

Using high-brightness display settings, 3D screen savers, or other power- intensive programs such as complex 3D graphics applications.

Running the computer in maximum performance mode. See "Configuring Power Management Settings" in your Hardware Owner’s Manual for information about accessing Windows Power Options Properties or Dell QuickSet, which you can use to configure power management settings.

You can check the battery charge before you insert the battery into the computer. You can also set power management options to alert you when the battery charge is low.

CAUTION: Using an incompatible battery may increase the risk of fire or explosion. Replace the battery only with a compatible battery purchased from Dell. The battery is designed to work with your Dell computer. Do not use a battery from other computers with your computer.

CAUTION: Do not dispose of batteries with household waste. When your battery no longer holds a charge, call your local waste disposal or environmental agency for advice on disposing of a lithium-ion battery. See "Battery Disposal" in the Product Information Guide.

CAUTION: Misuse of the battery may increase the risk of fire or chemical burn. Do not puncture, incinerate, disassemble, or expose the battery to temperatures above 65°C (149°F). Keep the battery away from children. Handle damaged or leaking batteries with extreme care. Damaged batteries may leak and cause personal injury or equipment damage.

Checking the Battery Charge

The Dell QuickSet Battery Meter, the Microsoft Windows Power Meter window and icon, the battery charge gauge and health gauge, and the low- battery warning provide information on the battery charge.

Quick Reference Guide

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Dell YU151, M2300 manual Checking the Battery Charge