I was just thinking about what is inside batteries, and realised that not only do I not really know what is inside batteries, but I had sort of always pictured the insides of batteries as being like a sort of tiny Swiss Roll, only made with shortbread and some sort of dry, chocolatey filling.
There are a surprisingly or unsurprisingly large number of videos about this on YouTube. I hesitate to link in case I spoil the sense of mystery. I suspect there must be sherbert or popping candy involved at some point, based merely on my own battery licking experiments.
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