Zimmie@mcc@mastodon.social In case you didn’t know, most alkaline 9v batteries are six AAAA batteries connected in series internally. They’re annoying to cut apart, but a lot more common than AAAA at retail.
mcc@bob_zim@infosec.exchange I've heard this but I don't understand why they'd do this when the market for AAAAs is so much smaller than the market for 9Vs
Zimmie@mcc@mastodon.social There isn’t a convenient chemistry which develops 9v directly, so to provide that voltage, the battery must have multiple cells. The process to make a AAAA cell is basically the same as the process to make any of the other more common cylindrical cell sizes, so the market is mostly the construction of 9v batteries plus selling a few loose cells for tablet pens and such.
Outside LiPo cells, prismatic batteries have basically always been a group of a bunch of cylindrical cells in somewhat uncommon sizes. For example, those 6v lantern batteries with the spring contacts (MN908, PJ996, and several other designations) were usually four F cells (recent ones are often four D cells or eight C cells).