These panels come to us from Voltaic Systems, makers of fine solar-powered bags and packs. These are waterproof, scratch-resistant, and UV-resistant, and they use four high-efficiency monocrystalline SunPower cells with 22+% efficiency (praise the sun!). The panel is made of 4 cells with a nominal voltage of 0.5V each, so we call this a "2V" panel

They output a nominal 2V at 150 mA peak via two solder-able pads on the back. The panel is constructed with ETFE (Ethylene Tetrafluoroethylene), making it extremely durable and resistant to environmental elements, a superior upgrade to PET or laminate solar panel construction. They can easily stand up to typical outdoor use, including being dropped and leaned on.
Unlike the larger panels, these don't come with a connector. Instead, there are two pads on the back. To connect, we recommend soldering two wires and attaching a 2.1mm terminal block. (Or you can cut off the alligator clips from a 2.1mm-to-clip adapter)
Note that these will not work with our solar charger boards (they expect 5.5 or 6V panels) but there may be projects that can either benefit from a smaller voltage panel, such as power harvesting circuits. Or, you could connect 3 of these in series to get nominal 6V output.