 Hi, this is Dieter Bohm for The Verge and we are looking at the Powertrek. This is a fuel cell charger. It's actually pretty cool. So there's two parts to this. The first is a very standard part. It's a 2000 milliamp battery, the same sort of external battery that you've seen before. It's got a micro USB plug on this end. It's got a standard USB female port on this end. You can use it to charge your iPhone or what other phone you've got. It's pretty straightforward. But this is the interesting side. So it has these pucks which have got some chemicals in them and then this little plastic doohickey. And what you do is you put some little just a little bit of water in there, about a tablespoon or so. You seal that up and then you take the puck and you set it into that container there and a little bit of water will shoot into it and that will activate the chemicals inside and it will start providing power. And the company says it provides about five watt hours of power which you can use to either charge your phone directly or it will also charge up this 2000 milliamp battery at the same time or on its own. They say it'll charge this battery up in about two and a half hours that basically the fuel cell provides the equivalent of about four double-a batteries. Should be available in the US in May or so. They say that perhaps REI might be a spot where you can go find these. That is the Powertruck fuel cell charger.