Dell Latitude E6220 (Mid 2011) - Manual (Page 13)

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Battery
Removing The Battery
1. Follow the procedures in Before Working On Your Computer.
2. Slide the battery release latches to the unlock position.
3. Remove the battery from the computer.
Installing The Battery
1. Insert the battery into its compartment.
2. Rotate the battery downward until it clicks into place.
3. Follow the procedures in After Working Inside Your Computer.
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