There are a myriad of solar cell phone chargers out there, but this is the first one I’ve found that actually encourages you to carry it around with you. I understand the frustration of a dead cell battery, but attaching something else to to your cell phone just seems cumbersome. Granted, you can charge this little device separately and then use it to power up, but eh. Looks like something that might catch on in Japan rather than the States. If this is your thing, it will be available February 9th.