This reviewer received promo considerations or sweepstakes entry for writing a review.
I would frequently take this off the charger in the morning and after two 30-minute calls I was hearing 'low battery.' This was while using the included USB-A dongle and not connected to any other devices via bluetooth.
Overall, they work great and the sound quality is excellent, but you basically have to keep it plugged in while on a call.
Update, almost a year later: I got a warranty replacement from Poly (HP) for the battery issue but still can barely get through a 30 minute meeting when fresh off the charger. I've since switched back to my old wired headset since I cannot count on this to work.
Second update: The second warranty replacement seems to have resolved the battery issue, but now the audio is cutting out on both the mic and speakers via both bluetooth and the included USB dongle. I could try one more warranty replacement since that expires in two days, but it's going into my electronics recycling box instead. I since bought a Jabra wired headset and it has worked wonderfully.
