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by agurk 2153 days ago
A Pile was the first type of battery [0] and you can still see this in French where la pile is a battery (or more strictly usually used to refer to a cell).

That being said it looks like OP might be German and I've never heard anyone using the term die Säule in this context.

I would take a guess that they are drawing a distinction between rechargeable and disposable batteries.

[0] https://en.wikipedia.org/wiki/Voltaic_pile