mcc@mcc@mastodon.social
I ran out of AAAA batteries but then I bought more AAAA batteries. Now I have extras
mcc@mcc@mastodon.social
Noisytoot@noisytoot@berkeley.edu.pl
@mcc@mastodon.social IPv6 batteries
Zimmie@bob_zim@infosec.exchange
@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.
ROTOPE~1 ⭐
️@rotopenguin@mastodon.social
@bob_zim@infosec.exchange @mcc@mastodon.social I've pulled apart one major brand that does that. Most 9v batteries are more like a stack of little plastic trays or nippless legos.
mcc@mcc@mastodon.social
@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@bob_zim@infosec.exchange
@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).
Zimmie@bob_zim@infosec.exchange
@rotopenguin@mastodon.social @mcc@mastodon.social While I’ve never personally encountered that style, I have heard of it. The lower terminal surface area would limit the potential discharge rate, but most 9v applications don’t need to support high discharge. Maybe cheaper batteries marketed for smoke alarms specifically?
I know Duracell Ultra 9v batteries are six AAAA cells. All the Energizer 9v batteries I’ve disassembled have been, too.