Lithium-ion batteries are long-lasting, rechargeable and used in a variety of devices--including laptop computers and personal digital assistants (PDAs)--where disposable batteries would not be feasible. The batteries' cells are replenished in a special charger designed to protect the cells from overcharging. When a lithium-ion battery is allowed to totally discharge for a long period of time or the battery is losing its charge quickly, the lithium-ion battery needs resetting. Once reset, the battery is restored to its full capacity.
Use the device containing the lithium-ion battery until the battery is completely discharged.
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Plug the device's power cord into an electrical outlet. Plug the other end of the device's power cord into the device.
Remove the lithium-ion battery from the device if the device has an external lithium-ion battery charger. Match up the metal contacts on the side of the lithium-ion battery with the metal contacts in the charger.
Place the lithium-ion battery in the charger. Plug in the charger's power cord into an electrical outlet.
Look for the "Charge" or "Power" light to illuminate on the device or battery charger.
Let the lithium-ion battery fully charge until the "Charge" or "Power" light turns off.
To keep your device's lithium-ion battery from developing problems and its gauge from displaying incorrect values, completely discharge the battery once a month and perform the reset procedure to regulate both the battery and its gauge.