Anyway, If these are eneloop xx that are rebadged, they would be a really good deal.
I am 100% sure that these ARE NOT eneloop XX's. First reason being even the newest packages of Duraloops are only 3rd gen eneloops (so they're [sanyo/panasonic] obviously not selling off the newest/best eneloops to be rebranded. They want their own name on the best/newest ones. And two the XX's are higher priced than regular eneloops, again there is no way they're letting another company they sell to rebrand their batteries and then undercut them. Even if I knew nothing about the batteries that's common sence business 101.
Eneloop XX's are their best battery, they don't let them get rebranded. Like mentioned above not all SANYO (now panasonic) cells are eneloops, SANYO/Panasonic is one of the leading battery mfg's in the world, they make cells sold under dozens of names, only a fraction of what they produce are eneloops and only a fraction of those get sold off to be rebranded. Its very likely that multiple brands of NiMH cells we don't know of, including low performers, are produced by SANYO/Panasonic, not only do they mfg several of their own design cells but they also mfg cells of other companies design and specifications. There's a pretty good chance these cells are mfg'd by SANYO for P&G (owners of duracell) but I'm confident they're not eneloops and I'm absolutely sure that at $10/4pk they're not eneloop XX's.
Go to a target (of w/e store around you carries both real Duraloops and the black top duracells and look at the packaging, everything about it is the same (other than the country of origin). From the "recharge 400 times" to the duracell part number (DX1500, AAA's are DX2400). The labeling is all the same, the one true way to tell is the white ring on the top, these Walmart ones have a black ring (the visual give away that they're NOT eneloops). If Walmart wanted to sell rebranded eneloops they are as big if not bigger of a company than P&G, they wouldnt be buyin a rebranded battery threw another company, they would buy them directly from SANYO/Panasonic and rebrand them themselves. Most likely the duracell cells they are using for these "Walmart" batteries are truely of duracell design (however they may still be mfg'd by SANYO and/or Panasonic).
Im not going to spend the $10 on a pack of them since I have plenty of eneloops and if/when I need more NiMH AA's I will buy more eneloops however if you want to send me one or two of yours I would be happy to run as many tests as you want on them and some real eneloops and/or real duraloops at the same time then report the results here, I'm sure the results of capacity and current draw tests would verify these are something else.