Acer Extensa 4220 - Manual (Page 5)

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Note: The grounding pin also provides good protection from
unexpected noise produced by other nearby electrical devices that
may interfere with the performance of this product.
• Use the product only with the supplied power supply cord set. If you need
to replace the power cord set, make sure that the new power cord meets
the following requirements: detachable type, UL listed/CSA certified, type
SPT-2, rated 7 A 125 V minimum, VDE approved or its equivalent, 4.6
meters (15 feet) maximum length.
Product servicing
Do not attempt to service this product yourself, as opening or removing covers
may expose you to dangerous voltage points or other risks. Refer all servicing to
qualified service personnel.
Unplug this product from the wall outlet and refer servicing to qualified service
personnel when:
• the power cord or plug is damaged, cut or frayed
• liquid was spilled into the product
• the product was exposed to rain or water
• the product has been dropped or the case has been damaged
• the product exhibits a distinct change in performance, indicating a need
for service
• the product does not operate normally after following the operating
instructions
Note: Adjust only those controls that are covered by the operating
instructions, since improper adjustment of other controls may
result in damage and will often require extensive work by a
qualified technician to restore the product to normal condition.
Guidelines for safe battery usage
This notebook uses a Lithium-ion battery. Do not use it in a humid, wet or
corrosive environment. Do not put, store or leave your product in or near a heat
source, in a high temperature location, in strong direct sunlight, in a microwave
oven or in a pressurized container, and do not expose it to temperatures over
60°C (140°F). Failure to follow these guidelines may cause the battery to leak
acid, become hot, explode or ignite and cause injury and/or damage. Do not
pierce, open or disassemble the battery. If the battery leaks and you come into
contact with the leaked fluids, rinse thoroughly with water and seek medical
attention immediately. For safety reasons, and to prolong the lifetime of the
battery, charging will not occur at temperatures below 0°C (32°F) or above 40°C
(104°F).
The full performance of a new battery is achieved only after two or three
complete charge and discharge cycles. The battery can be charged and