Interesting little lanterns, what do you guys think?

I came a cross these little dynamo lantern/flashlight/charger things. Does anyone have any experience with them? They seem pretty handy.

Amazon.com: Ivation Rainproof Collapsible Hand...



Interesting little lanterns, what do you guys think?

Amazon.com: Ivation Rainproof Collapsible Hand... Amazon.com: Ivation Rainproof Collapsible Hand...