New on the block is the Mpow IPX7
Super Affordable, solid bluetooth headphones
The Mpow Bluetooth Headphones make full use of Bluetooth v 4.1 to establish a connection. Which means they are listed as able to make and maintain a connection to a Bluetooth enabled device from about 33 feet away.
The Headphones feature a 100 mAh battery which is listed to offer up to 7 hours of playback. Alternatively, these headphones are listed as capable of retaining power in standby mode for as long as 220 hours.
Charge time is just 1.5 hour till full charge.
Amazon are selling the Mpow IPX7 at a great price at the moment.