To reduce potential safety issues, use only the battery provided with the computer, a replacement battery provided by the manufacturer, or a compatible battery purchased from the manufacturer. The computer runs on battery power whenever it is not plugged into external AC power. Computer battery life varies, depending on power management settings, running programs, display brightness, external devices connected to the computer, and other factors. Keeping the battery in the computer whenever the computer is plugged into AC power charges the battery and also protects your work in case of a power outage. If the computer contains a charged battery and is running on external AC power, the computer automatically switches to battery power if the AC adapter is disconnected from the computer or an AC power loss occurs.
Battery discharge time varies depending on the features you use while on battery power. Maximum discharge time gradually decreases as the battery storage capacity naturally degrades. Tips for maximizing battery discharge time:
To reduce the risk of damage to a battery, do not expose it to high temperatures for extended periods of time.
If a computer will be unused and unplugged from external power for more than 2 weeks, remove the user-replaceable battery and store it separately.
To prolong the charge of a stored battery, place it in a cool, dry place.
A stored battery should be checked every 6 months. If the capacity is less than 50 percent, recharge the battery before returning it to storage. Calibrate a battery before using it if it has been stored for one month or more.
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