TestFreaks tried the Braven 570 Bluetooth Speaker
A quote from the article:
Up for review today I have the Braven 570 Bluetooth speaker but it's much more than that as it is also a speakerphone but more importantly it's also a portable battery to keep your devices charged. The 570 has a 1200mAh battery inside with a standard USB port so you can keep your devices charged while on the go. The Braven 570 is sort of an all-in-one device I guess you could say and it just sounds very good really. The 570 is made of an impact resistant polymer so it can withstand daily use surely and it comes in many different color choices. Read on to learn more?Braven 570 Bluetooth Speaker Review @ TestFreaks