So, my replacement turned up in super quick time, but the same problem: unit would not power up. I was worried that maybe I was doing something wrong, so did some research, and it appears that this is a pretty common issue with the Plantronics BackBeat Fit. I contacted Plantronics support, who led me through a short diagnosis, and came to the conclusion that the "rechargeable battery might have been damaged" and that I should send it back for a replacement.
I will be trying these to see if, finally, I can get some bluetooth headphones with some reliability.
These didn't power on as they're supposed to out of the box, and, after a lengthy attempt to charge them, still wouldn't power on.
They do, however, fit like a dream, with no dangly wire to tickle the back of your wet neck unlike other bluetooths, so I've plumped for the immediate replacement option.
Hopefully, they'll work properly, but I'm beginning to wonder about the validity of bluetooth earphones as a technology; so many of them seem to suffer from reliability issues in a way that no other tech I use does.
The headphones arrived as ordered (no problem with Amazon delivery) but the headphones didn't work. I suspected there was a problem when I opened the package. The instructions said that the headphones had enough charge to set up the blue-tooth etc but there was no response from the on/off button. I then charged the headphones for 3 hours (longer than necessary for a full charge) - no surprise, despite the charging-in-process light being on, the battery had stored no charge at all. This is not a cheap product and I'm very disappointed that Pantronics are sending out faulty goods. Similar feedback has been left by other customers so there's clearly an issue here. This is such a basic issue and I be loath to recommend them to anyone else. I've taken a gamble and ordered a replacement - if it works that's fine, if there's a problem then I'll be complaining directly to Amazon and the company.
I love these headphones. No wiring to worry about to get caught when you run and don't also need to worry about sweat getting into the wiring either in the ear phones as it is moulded in plastic. My only criticism is if they had different attachment would be better people with smaller earholes.
My Backbeat Fit came DOA. Buttons not stuck or anything, just won't power on or take a charge. Red LEDs come on when plugged into a charger but even left overnight doesn't go to blue. Power button completely unresponsive, no LEDs come on when unit is not plugged in.