The headphones had good clarity and range. The have become more static and have less range.
SOURCE: Bad battery for my Sennheiser HDR 45 headphone
A replacement battery can be purchased from Sennheiser for $20.00.
Battery is: BA 151
Sennheiser Link:
http://www.sennheiserusa.com/newsite/productdetail.asp?transid=004146
SOURCE: My cordless HDR 130 Sennheiser headphones no
The batteries are at end-of-life OR your charger has failed.
Forst replace the batteries... they are MOST likely bad. Charge the new ones before using.
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