This is a nice little product: The Primo Cube is a tiny, square charger that connects to the side of your phone via miniUSB or microUSB, giving you additional battery life in a way that’s not cumbersome or heavy thanks to a 1000mAh battery. Its compatible with any phones that utilize that USB connection (which is to say, a lot) and sure seems useful for a long day of traveling.

The Primo Cube is available now for $40.

Chris Gullo