it is disappointing that amazon did not check the diapers return to make sure the package was still manufacturer sealed before reselling it. Also bad for amazon that they did not understand what the customer was trying to tell them so they had to see it in media reports to understand the issue.
pro tip for batteries - when buying brand-name (other than amazon brand batteries), it is best to deal with those batteries when sold by amazon.com and not third party sellers. i've read many horror stories of third party sellers buying bulk brand name battery packs, putting 5 or 10 or whatever batteries in a zip lock bag, and the batteries bang against each other during delivery handling causing leakage. I buy my brand name batteries as sold directly by amazon and they are always in manufacturer packaging and never have had batteries arrive leaking. Sometimes they leak in my device after a long time in the device, but i don't think that is because of delivery handling but because of age.