GrumpyOldGuy
Contributor
I am now naming names. My elcheapo light is branded Ultrafire. When it arrived it was non functional. I cleaned a whole pile of grease out of it and tossed one of the cut through orings. The light still flickered and went on and off if you tapped it. On subsequent inspection, the outer plastic coating on the Ultrafire GH 26650 5000mAH battery was starting to peel away at the bottom. And a metal spacer fell off, revealing a battery inside a tube. WTF? The outer tube is the proper size for a 26650, but there is a much smaller battery jammed inside the tube. So the 5000mAH rating is extremely suspect. But I did get what I paid for. My mistake.
When I was going through one of my green phases, I stocked up on rechargeable batteries for lots of gizmo's. The "C" sized Eveready batteries had the similar design, a C sized case with a AA battery inside. Not a happy camper considering they were 2X more expensive. My take away was batteries are really hard to find the best value because what you are buying is a shape and meaningless number on the side...