User's Manual

Important safety information
Presence | 3
Safety instructions for rechargeable batteries
In extreme cases, abuse or misuse of rechargeable batteries can lead to:
WARNING
•explosion,
• fire development,
• heat generation or
• smoke or gas development.
Dispose of products with
built-in rechargeable
batteries at special
collection points or return
them to your specialist
dealer.
Switch rechargeable
battery-powered products
off after use.
Only use rechargeable
batteries recommended by
Sennheiser and the
appropriate chargers.
When not using
rechargeable batteries for
extended periods of time,
charge them regularly
(about every 3 months).
Only charge rechargeable
batteries at ambient
temperatures between
10 °C/50 °F and 40 °C/
104 °F.
Do not heat above 70 °C/
158 °F, e.g. do not expose to
sunlight or throw into a fire.