Sennheiser MX W1 Instruction Manual page 5

Safety instructions for Lithium-Ion rechargeable batteries
If abused or misused, rechargeable batteries may leak. In extreme
cases, they may even present a
• heat hazard
• fire hazard
Please understand that Sennheiser does not accept liability for
damage arising from abuse or misuse.
Keep away from
children.
Do not heat above
70°C/158°F, e.g. do
not expose to
sunlight or throw into
a fire.
Do not expose to
moisture.
Do not short-circuit.
Do not mutilate or
dismantle.
Do not get fully
charged but
unpacked
rechargeable
batteries mixed up.
Do not continue to
use defective
rechargeable
batteries.
Only use original
Sennheiser
rechargeable
batteries.
• explosion hazard
• smoke and gas hazard
Observe correct polarity.
Switch rechargeable battery-
powered devices off after
use.
Remove rechargeable
batteries when the unit is not
used for extended periods of
time.
Only charge rechargeable
batteries with the
appropriate Sennheiser
chargers.
When not using rechargeable
batteries for extended
periods of time, charge them
regularly (about every three
months).
Only charge rechargeable
batteries at ambient
temperatures between 10°C
and 40°C.
Immediately remove
rechargeable batteries from
obviously defective devices.
Dispose of rechargeable
batteries at special collection
points or return them to your
specialist dealer.
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