I've ordered a set of 4 AA cells to see how they work.

Now these cells clearly have a circuit for charging and to step the 3.6ishV down to 1.5V.

IF they perform as advertised, they would be an extremely good value. I'll run some tests, voltage drop in a 4 cell incandescent flashlight versus time, charge them, leave them in the freezer and repeat the test. We seldom have temperatures below zero more often then once or twice a winter, but when we do, many cells / batteries roll over and play dead until they warm up.

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I have an older Panasonic digital camera that eats cells, it takes two AAs and you get about 50 photos with high quality alkaline. It will be interesting to see how these cells work in this camera.?

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I only keep the camera because we were able to remove the IR blocking filter and the camera takes very high quality IR photos. I fell in love with IR when I was 8 and Dad bought a roll of Kodak IR film to photograph some trees on land our family owns in Eastern KY. Trees with health problems can "scream" at you in IR (or BW with a deep red filter).

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We ended up cutting down about 50 diseased trees. I was too young to understand what was wrong.

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Normal digital cameras are moderately sensitive to IR, you can check an IR remote control with a camera phone, but they include IR blocking filters that knock down at least 90% of the near IR and all of the deeper IR, remove the filter and it's an entire new world, if you have an IR pass filter.

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The camera has a xenon flash that produces near zero IR. I have to illuminate an object with an array of IR LEDs.

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