Try a set of lithium AAA batteries. The CC seems to be very sensitive to minimum voltage, and the lithium batteries deliver their lifetime current contribution at a voltage level that seems to match the CC's appetite better than any alternative battery chemistry. Alkaline cells can still work in a pinch, which is nice, but the CC seems to be a poster child for the light weight, low volume, and high energy availability of AAA lithium battery cells.
As a bonus, lithium cells offer a no-load shelf life of 10-15 years without serious capacity loss, and can handle temperature extremes that send alkaline cells running for cover as a matter of course.
It's worth a try, no?
Voyager
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