Sennheiser HDE 2020-D Instruction Manual page 6

If abused or misused, rechargeable batteries may leak. In extreme cases, they may
even present:
• a heat hazard,
CAUTION!
• a fire hazard,
• an explosion hazard,
• a smoke or gas hazard.
Sennheiser does not accept any 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 pack charged
batteries loose – danger of
shorting out / fire hazard.
Do not continue to use
defective rechargeable
batteries.
Only use original Sennheiser
rechargeable batteries.
Important safety instructions
Observe correct polarity.
Switch rechargeable battery-
powered devices off after use.
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/50°F and 40°C/104°F.
Immediately remove rechargeable
batteries from obviously defective
devices.
Dispose of rechargeable batteries
and devices with built-in recharge-
able batteries at special collection
points or return them to your
specialist dealer.
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