Calculator collection : How to power calcs without constantly opening?

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(12-01-2021 02:18 AM)EugeneNine Wrote:  I've had more Rayovac's leak than any other AA, then Energizer and then Duracell. Manufacturing lines change from time to time so the battery you buy today isn't the same as the one you bought a decade ago.

Well known brands should have their manufacturing process down pat so you would only get the occasional tail of the distribution. I've had a couple of Energizers leak, but only because I buy far more of them than Duracells. Relabeled house brands (hardware store, grocery store) always seem to leak!