By the way, some suggested using the right battery for the right job.
To my knowledge, Eneloop doesn't make a D cell. Others do, but I only
trust Eneloop. They do have multi AA to D adapters, but for the small
amount of current drawn, I went with a single AA to D this time around.

That is your choice, of course. But there are many manufacturers as reliable and established as Panasonic that do not require you to indulge in a questionable exercise to adapt to the basic inadequacies of their designs. In addition, one does wonder what Panasonic would do in the case of a spectacular failure within the warranty period - would they perform, or not? After all, your adaptation did alter their design - under very nearly any scenario, that voids any warranty, expressed or implied.

https://www.nytimes.com/wirecutter/r...ble-batteries/
https://reactual.com/portable-electr...batteries.html
https://www.ign.com/articles/best-re...able-batteries

Peter Wieck
Melrose Park, PA