Care and maintenance
Replacing/removing the rechargeable battery
CAUTION
Danger of damage to the product!
During the warranty period, the rechargeable battery must only be replaced
by an authorized Sennheiser service center, otherwise the warranty will be
null and void.
Contact your Sennheiser service center if the rechargeable battery needs
X
to be replaced or removed. To find a Sennheiser service partner in your
country, visit www.sennheiser.com.
Outside the warranty period, the rechargeable batteries may be replaced or re-
moved by any qualified service center in an appropriate manner. Instructions on
how to replace or remove the batteries for qualified service centers are available
from the Sennheiser service partner.
HD 4.40BT
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