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External devices
CAUTION:
Do not connect or disconnect any external device cables other than USB cable while the computer
power is on; otherwise, you might damage your computer. To avoid possible damage to attached
devices, wait at least ve seconds after the computer is shut down to disconnect external devices.
General battery notice
DANGER
Personal computers manufactured by Lenovo contain a coin cell battery to provide power to
the system clock. In addition, many mobile products, such as notebook computers, utilize a
rechargeable battery pack to provide system power when in portable mode. Batteries supplied by
Lenovo for use with your product have been tested for compatibility and should only be replaced
with approved parts.
Never attempt to open or service any battery. Do not crush, puncture, or incinerate batteries or
short circuit the metal contacts. Do not expose the battery to water or other liquids. Only recharge
the battery pack strictly according to instructions included in the product documentation.
Battery abuse or mishandling can cause the battery to overheat, which can cause gasses or ame
to “vent” from the battery pack or coin cell. If you notice any signs of bulging, leakage or corrosion
on the exterior of the product, this may be the result of an internal battery fault. If this occurs, stop
using the product immediately and please contact the Lenovo Support team for further instructions.
Factory replacement of the batteries may be required.
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.
Built-in rechargeable battery notice
DANGER
Do not attempt to replace the internal rechargeable lithium ion batteries. Contact Lenovo Support
for factory replacement.
Lithium coin cell battery notice
DANGER
Danger of explosion if battery is incorrectly replaced.
When replacing the lithium coin cell battery, use only the same or an equivalent type that is
recommended by the manufacturer. The battery contains lithium and can explode if not properly
used, handled, or disposed of.
Do not:
• Throw or immerse into water
• Heat to more than 100°C (212°F)
viii User Guide