It's the batteries stupid.

[mrfixitman]

Maybe deciding which flashlight(device) to use should be decided on the best/least expensive battery available. Seems the winner might be used A123 26650.50¢ or less each, with lots of life left. They fit nicely in C Cell devices but there is a voltage increase and spring adjustment. I am also thinking of making adapters for my D cell devices when the NMHi go bad... don't hold your breath. The four row chargers are around $20. Tip: One cell replaces two and the flashlight works normally. Needs adapter or longer spring. In three cell devices 2 cells almost fit (spring stretch) and almost a doubleing of voltage.Lawrence Rhodes

 

[hamhanded]

Where do you get them?

 

[mrfixitman]

I got mine a while back from a friend. These are identical. They are very robust and inexpensive. However shipping might cost. 42 cents each plus shipping. Battery Hookup. https://batteryhookup.com/products/...8p-config?mc_cid=d2daac4a60&mc_eid=435f39e8a7