Just buy the 10p ones, no point faking shit that cheap.
You'd be surprised, honestly you would.
Say you're a Chinese equivalent of "Cut me own throat" Dibbler and you've just taken delivery of a job lot of zinc-carbon AAA batteries that your more honest colleagues cannot shift at all, because there's nobody left in the world who'd buy zinc-carbon batteries when alkalines are as cheap and last way longer.
So, there's you with your load of old-technology cheap crap batteries. How to shift them? Easy, just run off a job lot of Duracell packaging and put them into those wrappers, then hawk them on everyone's favourite tat bazaar eBay at stupidly low prices. Sooner or later some complete mug is going to buy them, and get burned on the deal. Doesn't matter to Chinky CMOT Dibbler; there's a never-ending supply of dozy idiots willing to buy crap at silly prices...