I use a Jabra Evolve2 85 headset, and after 10 seconds of no audio activity, its power-saving feature kicks in.
When power-saving is active, it can take a second or two for the audio to be audible, which is a big problem. If I get a short instant messenger notification, it goes unnoticed. If I start a video, I don’t hear the first few words.
Jabra’s Sound+ application doesn’t offer a way to disable power-saving. According to Jabra’s customer support, the following justifies this feature:
There is a purpose to this behavior, what you may consider a flaw, and that is to decrease BT radiation, preserve battery and help with density issues – in an office with tens of workers, it would be impossible for all employees to all use wireless devices if this feature was not turned on.
The delay is slightly greater via Bluetooth than with USB devices on the cable since the HFP Bluetooth profile used has a relatively high latency. This is usually not noticeable in communication and is used for integrated error correction, but is technically anchored in the Bluetooth standard, not in the product.
It’s not a good enough reason. To me, this is a major misfeature, and it should be possible to disable it. I wrote a script to keep the wireless audio connection alive and avoid delays, which I hope will be useful to others.
I can’t recommend Jabra products until they provide a related option and offer replacement batteries.