C670/C670D/L770/L775/L770D/L775D
Please be aware that the actual remaining operating time may differ slightly from the calculated time.
With repeated discharges and recharges, the battery's capacity will gradually decrease. In view of this it will be noted that an often used, older battery will not operate for as long as a new battery even when both are fully charged.
Maximizing battery operating timeA battery's usefulness depends on how long it can supply power on a single charge, while how long the charge lasts in a battery depends on:
Processor speed Screen brightness System Sleep Mode System Hibernation Mode Display power off period
Hard disk drive power off period
How often and for how long you use the hard disk drive and external disk(c) drives, for example, optical disc drive.
How much charge the battery contained to begin with.
How you use optional devices, such as a USB device, to which the battery supplies power.
Whether you enable Sleep Mode, which can conserve battery power if you are frequently turning the computer off and on.
Where you store your programs and data.
Whether you close the display panel when you are not using the keyboard - closing the display saves power.
The environmental temperature - operating time decreases at low temperatures.
The condition of the battery terminals - you should always ensure the terminals stay clean by wiping them with a clean dry cloth before installing the battery pack.
Extending battery lifeTo maximize the life of your battery packs:
At least once a month, disconnect the computer from a power source and operate it on battery power until the battery pack fully discharges. Before doing so, follow the steps as detailed below.
1.Turn off the computer's power.
2.Disconnect the AC adaptor and turn on the computer's power - if it does not turn on then go to Step 4.
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