I did call Duracell today about the Ion Cores.
They confirmed that the first three digits are date code.
For example, "426. . ." indicated a battery made in the 26th week of 2014.
Thank you so much for solving that :thumbsup:
At this stage sounds like this one is pretty much identical to the Amazon Basics High-Capacity (also made in Japan). Correct?
For my region the Amazon product is actually 7% cheaper and I don't have to drive to Walmart.
So thinking of simply ordering the Amazon cells, unless I am missing something important.
It does (and thanks for the link to HKJ's review)
Ion-Core AAs can still be found @ $6.50/4-pk for 2x pks on eBay (I have bought from this seller using that payment method)