Lenovo E31-70 User Manual page 12

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 flame to "vent" from the battery pack or coin cell. If
your battery is damaged, or if you notice any discharge from your battery
or the buildup of foreign materials on the battery leads, stop using the
battery and obtain a replacement from the battery manufacturer.
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 also
can pose a safety hazard. Do not let rechargeable Lithium-Ion batteries
completely discharge or store these batteries in a discharged state.
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User Guide