Improper use
“Improper use” means using the headphones other than as described in these instructions, or under operating conditions which differ from those described herein.
Safety instructions for batteries/rechargeable batteries
If abused or misused, batteries/rechargeable batteries may leak and, in extreme cases, may even present an explosion and fire hazard. Sennheiser does not accept any liability for damage arising from abuse or misuse.
Keep batteries out of reach | Immediately remove flat batteries/ |
and out of sight of | rechargeable batteries from the |
children. | device. |
Do not heat or throw into fire.
Do not
Do not solder.
Do not mutilate or 
dismantle.
Do not pack charged batteries loose – danger of shorting out – fire hazard. Do not get flat and fully charged batteries/ rechargeable batteries mixed up.
Do not attempt to
Observe correct polarity.
Switch off
Remove batteries/rechargeable batteries when the device is not used for extended periods of time.
Only charge rechargeable batteries with the appropriate Sennheiser chargers.
After extended periods of
Only charge rechargeable batteries at 
ambient temperatures between 10 °C and 40 °C.
Dispose of exhausted batteries/ rechargeable batteries at special collection points or return them to your specialist dealer.
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