Another day, another portable Bluetooth speaker. This time, it's Kinivo's BTX350 ($70). The size and shape are pretty much in line with what we've come to expect from the style since the Jambox, but the cloth covering the speakers is somewhat uncommon. On top of the unit are physical control buttons, with a "bass" button in addition to all the other standard controls. The most interesting thing about this one is the battery. Even though it only lasts…
