Here's a size comparison



As you can see the NiteCore EZ AA is impressively small for an AA flashlight but the Zebralight H50 has just got the edge on size. But the Nitecore will probably be a little more practical due to the conventional beam shape rather than the Zebralight uses. Using an Energiser Lithium AA would give the NiteCore EZ AA a very lightweight and dependable flashlight for use in an Altoids tin or for EDC. It looks to be very impressive and can even be used as an improvised hand warming device

I also like the tripod thread on the Nitecore base so it can be used with one of those little handheld camera tripods such as the little Gorillapod.