A Compaq nc6400 is a laptop intended for business use. The laptop features a lithium ion rechargeable battery. The battery powers the laptop when it is not plugged into an electrical power source. Over time, lithium ion batteries lose efficiency and the amount of time the battery can power the notebook for diminishes. Calibrating or reconditioning the battery every two months can help prevent and restore lost efficiency.
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Turn off the laptop. Insert the AC power adaptor into the side of the Compaq nc6400 notebook.
Allow the AC power adaptor to fully charge the lithium ion battery for four hours.
Remove the AC power adaptor by gently pulling it out of the outlet on the side of the notebook. Power on the Compaq nc6400 notebook.
Power the laptop with the battery until the battery dies, or is completely discharged.
Recharge the lithium ion battery until the battery is fully charged.
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