Used the Solar-Crank Carabiner for 3 years. I like it a lot for everyday use, and it still works perfectly. After hurricane Sandy, liked it even better. It was my primary light. Dual power was very important; Charge by daylight at a window, and use it for couple of hours. When it runs low, use the crank to keep going indefinitely. Carabiner can be clipped onto a string or wire to position it perfectly as a working light. Couldn't be happier. I'm getting one for each of my kids to keep in their homes.