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Care and maintenance
MOMENTUM 4 | 39
Information on the built-in rechargeable
battery
Sonova Consumer Hearing GmbH ensures and guarantees that the
rechargeable batteries perform at their optimum upon purchase of
the product. If, upon purchase or within the warranty period, you sus-
pect that a rechargeable battery is obviously defective or if a
charging error/battery error is displayed (> 9), stop using the prod-
uct, disconnect it from the power supply system and contact your
Sonova Consumer Hearing partner. Your Sonova Consumer Hearing
partner will coordinate the repair/replacement with you.
Do not return a product with a defective battery to your dealer or
Sonova Consumer Hearing partner unless requested to do so. To find
a partner in your country, search at
www.sennheiser-hearing.com/service-support
).
At the end of its operational lifetime, this product with its built-in
rechargeable battery must be disposed of separately from normal
household waste. You can find more information here: > 43.
Installing firmware updates
Firmware updates can be downloaded free of charge from the Inter-
net using the Sennheiser Smart Control app. Sonova Consumer
Hearing recommends to always install the latest firmware version to
ensure the best performance of your product.
▷ Connect the headphones to your smartphone and start the Smart
Control app (> 19).
▷ The app provides information on available firmware updates and
guides you through the installation process.
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