Interesting. If I understand the article correctly, this product is basically just the hydrogen half of a traditional fuel cell (which is why the article mentions that you can't recharge something inside an airtight bag or on the Moon).

The bit about keeping the units below 120 degrees seems a bit limiting as far as taking this unit along with you, whether you're just a business traveller or an outdoors type. On a hot summer day, it would be easy to reach that temp if left in a parked vehicle. Hopefully that's just a conservative temperature rating.