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I have not used the headphones for at least three days. Even though the headphones are on "off" they continue to keep charging and have been for a couple of days. What is the reason for the constant charging??

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My Sennheiser HDR 140 headphones charge whenever you hang them on the charger. The charger will "trickle" charge them to keep the batteries fully charged. If you find when you use it the batteries discharge quickly it's time to replace them.
My batteries are about 2 years old and I still get about 8-10 hrs of use before needing to recharge

Posted on Jan 04, 2011


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Quote from LOGITECH official site:
In rare cases, the FreePulse Headphones may loose synchronization with the receiver. If this occurs the following steps will re-establish the connection by putting both the headphones and the receiver in discoverable mode (actively searching for another bluetooth device it can connect to).  
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Putting the receiver in discoverable mode:
Press and hold the power button (located on the side of the receiver opposite the headphone jack).The LED on the button will go through three states in this order:
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To re-establish the connection between the headphones and the reciever, put the headphones and the receiver in discoverable mode at the same time. It will take a few seconds for the two devices to establish the connection. Once the connection has been established the LEDs on both the headphones and receiver will glow solid blue.

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1 Answer

Loss of power

I have always assumed this has to do with the level of the signal coming in.
I have had these headphones for a few years, getting them at a discount outlet for cheap, and have been quite pleased with them.

The light on the front indicates 3 things.
1) no light = not transmitting and not charging
2) green light = transmitting
3) red light = charging

When there is sufficient signal to transmit, the green light comes on.
If you are getting the signal from a Stereo, the line output may NOT be enough to keep the transmission on.
There seems to be a sensor, that figures out if htere is an incoming signal to transmit. I have toyed with the idea of locating that and disabling, so it would always transmit what is incoming, even if a low signal! But I don't have the know how.

As is, I use the headphones with my PC and generally it finds the signal strong enough to continue to transmit.

.. Thanks... Andrew

PS..The toughest thing about these haedphones, is going to be finding NiCad batteries to keep them working. If you go in the store these days, you can find lots of NiMetal Hydride, and NiCad are gone from the shelves!

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