If you're familiar with the Braven brand, there's a good chance Divoom's Voombox ($100) will look like something you've seen before. Although it's not a direct clone, the portable Bluetooth speaker resembles units such as 625s and BRV-1. Quite substantial in its heft, and sporting a metal core surrounded by rubber, Voombox is advertised as being weather resistant and shock proof. The 12-hour rechargeable battery charges over micro-USB, and the port…