Omron ZEN Operation Manual page 15

Precautions
Precautions
WARNING
Serious human hazard may occasionally occur due to ignition or rupture of
the lithium battery used in the Battery Unit. Do not short the battery
terminals or charge, disassemble, deform under pressure, or incinerate
the battery.
Never use any battery that has been dropped on the floor or otherwise
subjected to excessive shock.
CAUTION
Electric shock, fire, or malfunction may occur. Do not disassemble, modify,
or repair the ZEN or touch any of the internal parts.
Electrical shock may occur. Never touch the I/O terminals, computer
connector, Expansion Unit connector, or Battery Unit connector while
power is being supplied.
Electrical shock may occur. Do not remove the Expansion Unit connector
cover unless an Expansion I/O Unit will be permanently installed.
Fires may occasionally occur. Tighten the terminal screws to a torque of
0.565 to 0.6 N·m (5 to 5.3 in-lb).
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