Quote:
Originally Posted by theducks
Just think how many years the AA / LR6 size (and family) has been in use.
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Since before 1914 anyway. Though the names A, AA, AAA, B, C, D, F, G are from about 1946. The AAAA is later, the AAA might be too, not sure. F cells and B cells are still inside some European/UK packs. The N or Lady cell is very old, pre-1939 and still made. The A is long gone, but one of the Li cells might be a similar size (18something size?) but wrong voltage. The 19th Flag or Bell size 1.5V cell is long gone, it was largest, but one of the Farmer's Zinc Air packs for Electric Fencers uses cells that size in it.
1/4" jack 19th C, even with 3 poles/connections. The 3.5mm version perhaps late 1950s or early 1960s.
The pair of giant LiPoly in my Samsung Chromebook are officially replaceable and the back pops off after taking out the 4 screws under the "rubber" feet.
All laptops used to have replaceable packs and now hardly any have. Gluing in the cells is evil.