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This may shorten the life of the battery, and may cause the battery meter to be inaccurate. Mobile computing The computer also has an internal real-time-clock (RTC) battery. The RTC battery powers the RTC memory that stores your system configuration settings and the current time and date information. It maintains this information for up to a month while the computer is turned off. TECHNICAL NOTE: The RTC battery does not charge while the computer is turned off, even when AC power is attached. The RTC battery charges only while the computer is powered on. Monitoring main battery power The computer’s main battery light gives you an indication of the main battery’s current charge. The following also applies to the secondary battery (available on certain models) if installed. . Glows amber while the main battery is being charged (AC adaptor connected) . Glows blue when the main battery is fully charged . Is unlit when the battery has discharged, the battery is not charging, or the AC adaptor is not plugged into the computer or AC outlet Battery life and charge time may vary, depending upon power management settings, applications and features used. . Flashes amber when the main battery charge is low and it is time to recharge the main battery or plug in the AC adaptor If the AC power light flashes amber during charging, either a battery pack is malfunctioning, or it is not receiving correct input from the AC power supply. Disconnect the AC power cord/cable and remove the battery pack. See “Changing the main battery” on page 29 for information on replacing the main battery. HINT: Be careful not to confuse the battery light () with the on/off light (). When the on/off light flashes amber, it indicates that the system is suspended (using the Windows® operating system Sleep command). TECHNICAL NOTE: The recharging of the battery cannot occur when your computer is using all of the power provided by the AC adaptor to run applications, features, and devices. Your computer's Power Options utility can be used to select a power level setting that reduces the power required for system operation and will allow the battery to recharge. Mobile computing Setting battery notification Your computer can be configured to warn you when the battery is running low. For more information, see “Setting battery notification” in the electronic user’s guide. Changing the main battery When your main battery has run out of power, you have two options: plug in the AC adaptor or install a charged main battery. Never short circuit the battery pack by either accidentally or intentionally bringing the battery terminals in contact with another conductive object. This could cause serious injury or fire, and could also damage the battery pack and computer. . Never expose a battery pack to abnormal shock, vibration or pressure. The battery pack's internal protective device could fail, causing it to overheat or ignite, resulting in caustic liquid leakage, or explosion or fire, possibly resulting in death or serious injury. TECHNICAL NOTE: To avoid losing any data, save your files and then either completely shut down your computer or put it into Hibernation mode before changing the main battery. Removing the battery from the computer To remove the battery: 1 Save your work. 2 Turn off the computer or place it in Hibernation mode according to the instructions in “Using and configuring Hibernation mode” in the electronic user’s guide. 3 Unplug and remove any cables connected to the computer, including the AC adaptor. 4 Close the display panel and turn the computer upside down. Before you turn the computer over, make sure that the computer display is properly closed, and is not in tablet mode. Setting the computer down on the display may cause damage to the screen. Mobile computing 5 Slide and hold the battery release latch to release the battery. (Sample Illustration) Unlocking the battery release lock 6 Lift up the discharged battery at the notch next to the latch and pull the battery out of the computer. (Sample Illustration) Removing the battery If the battery is leaking or its case is cracked, put on protective gloves to handle it, and discard it immediately. Always dispose of used battery packs in compliance with all applicable laws and regulations. Put insulating tape, such as cellophane tape, on the electrode during transportation to avoid a possible short circuit, fire or electric shock. Failure to do so could possibly result in serious injury. Taking care of your battery Inserting a charged battery To insert a battery: 1 Wipe the terminals of the charged battery with a clean cloth to ensure a good connection. 2 Insert the charged battery into the slot until the latch clicks. The battery has been designed so that you cannot install it with reverse polarity. If the battery does not slide into the slot easily, move the battery release lock to the unlocked position and try again. Do not force the battery into position. 3 Turn the computer right side...
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