Lenovo ThinkCentre A51, Quick Reference Manual

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Batteries can degrade when they are left unused for long periods of time. For
some rechargeable batteries (particularly Lithium Ion batteries), leaving a
battery unused in a discharged state could increase the risk of a battery short
circuit, which could shorten the life of the battery and can also pose a safety
hazard. Do not let rechargeable Lithium-Ion batteries completely discharge or
store these batteries in a discharged state.
Heat and product ventilation
Computers generate heat when turned on and when batteries are charging.
Notebook PCs can generate a significant amount of heat due to their compact
size. Always follow these basic precautions:
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Do not leave the base of your computer in contact with your lap or any part
of your body for an extended period when the computer is functioning or
when the battery is charging. Your computer produces some heat during
normal operation. Extended contact with the body could cause discomfort
or, potentially, a skin burn.
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Do not operate your computer or charge the battery near flammable
materials or in explosive environments.
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Ventilation slots, fans and/or heat sinks are provided with the product for
safety, comfort, and reliable operation. These features might inadvertently
become blocked by placing the product on a bed, sofa, carpet, or other
flexible surface. Never block, cover or disable these features.
CD and DVD drive safety
CD and DVD drives spin discs at a high speed. If a CD or DVD is cracked or
otherwise physically damaged, it is possible for the disc to break apart or even
shatter when the CD drive is in use. To protect against possible injury due to
this situation, and to reduce the risk of damage to your machine, do the
following:
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Always store CD/DVD discs in their original packaging
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Always store CD/DVD discs out of direct sunlight and away from direct
heat sources
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Remove CD/DVD discs from the computer when not in use
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Do not bend or flex CD/DVD discs, or force them into the computer or their
packaging
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Check CD/DVD discs for cracks before each use. Do not use cracked or
damaged discs
Additional safety information
DANGER
Important safety information
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