From my previous post; I thought I'd include a photo of the Convoy S2 vs. the Solorforce Z2 to show relative size compared to my hand. The Convoy would be great for dog walks but the Solarforce Z2 is what I carry in my pocket. It's so small that sometimes I have a hard time finding it in my pocket. Regardless, it's easy to handle with one hand. I've considered buying the smaller torches than use the Li-ion CR123's but those are so small that they are a little harder to handle ( at least for me ). For me the size of the single AA Z2 is about perfect. I wish it had memory but if it did the memory function would likely draw a small amount of parasitic current. Anyway, works for me.