this post was submitted on 12 Apr 2024
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Today I Learned

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What device even uses this??

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[–] redcalcium@lemmy.institute 128 points 7 months ago (6 children)
[–] BearOfaTime@lemm.ee 45 points 7 months ago (4 children)

I took apart a lot of batteries as a kid. The nine volts never had batteries like this inside them.

[–] _thebrain_@sh.itjust.works 71 points 7 months ago* (last edited 7 months ago) (2 children)

Since seeing this picture I have disassembled about 50 nine volts looking for this and have found about 3. Some full of coin cells too.

Edit: I should say it was years ago I first saw this picture. I haven't disassembled 50 batteries in the last 2 minutes

[–] edgemaster72@lemmy.world 46 points 7 months ago

I haven’t disassembled 50 batteries in the last 2 minutes

I reject your edit and substitute the original assumption

[–] Kolanaki@yiffit.net 18 points 7 months ago* (last edited 7 months ago)

I should say it was years ago I first saw this picture. I haven't disassembled 50 batteries in the last 2 minutes

How many batteries can you disassemble in 2 minutes? I'm starting the timer.... NOW! Go!

[–] Paragone@lemmy.world 12 points 7 months ago

The carbon-zinc ones never do, but the alkaline ones do, the ones I opened, anyways ( a few decades ago )

[–] RobotToaster@mander.xyz 12 points 7 months ago

Some have stacked flat cells IIRC.

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[–] sir_pronoun@lemmy.world 102 points 7 months ago (5 children)

But.. does the mythical A battery exist?

[–] Ghostalmedia@lemmy.world 68 points 7 months ago (2 children)

Every battery is a battery.

[–] RobotToaster@mander.xyz 12 points 7 months ago (3 children)

Most "batteries" are in fact cells.

[–] Plopp@lemmy.world 8 points 7 months ago (1 children)

This is why humans make good batteries.

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[–] BeatTakeshi@lemmy.world 10 points 7 months ago* (last edited 7 months ago)

A battery has many faces. A battery has no name.

[–] hellfire103@lemmy.ca 16 points 7 months ago* (last edited 7 months ago) (3 children)

It would appear ~~so~~ not.

[–] mihnt@lemmy.ca 18 points 7 months ago* (last edited 7 months ago)

An A battery is usually just called a 17500. They were used in laptop batteries and such but are now used in hobbies more. Mostly for flashlights, vapes, or Lightsaber replicas.

[–] Oisteink@feddit.nl 16 points 7 months ago (1 children)

Right - so that is a photo of an AA battery and a drawing of an A battery.

So if I take a photo of a gorilla and draw Sasquatch next to it I have proof of Sasquatch! This is good info to me.

BRB

[–] hellfire103@lemmy.ca 14 points 7 months ago (7 children)
[–] can@sh.itjust.works 18 points 7 months ago* (last edited 7 months ago) (2 children)

An AA battery next to a dimensioned 2D drawing of an A battery (7mm grid).

(This is an placeholder image for A battery section of en:List_of_battery_sizes. To be replaced with an actual example as soon as one comes along.)

Date 19 June 2011

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[–] Davel23@fedia.io 8 points 7 months ago (2 children)
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[–] Tadpole@aussie.zone 56 points 7 months ago (3 children)

Usually they're used in thin devices where a bigger battery wouldn't fit. Lots of computer styluses take AAAA batteries, including the Microsoft Surface Pen. There are also some small flashlights and laser pointers that use them.

[–] lycanrising@lemmy.world 12 points 7 months ago (1 children)

microsoft surface pen is my touchstone for this. the only way i could get new batteries was online and the pen lasted for so long if i bought a pack of 4 batteries i’d have lost the other two but the time they ran or so id need to but a whole new pack.

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[–] AresUII@lemmy.world 38 points 7 months ago (2 children)

There are six of these in some 9V piles

[–] dual_sport_dork@lemmy.world 31 points 7 months ago

Which was the secret knowledge for those of us with pen lights or active stylii back in the day that required AAAA cells. And then you'd find a cheap brand of 9v that actually had a stack of nonstandard square cells inside it instead... Bastards.

[–] Voyajer@lemmy.world 8 points 7 months ago (1 children)

Certain lantern batteries are filled with AAs as well

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[–] Mr_Fish@lemmy.world 33 points 7 months ago

I remember when I had a surface tablet, the stylus thing used a AAAA battery

[–] Kolanaki@yiffit.net 29 points 7 months ago (1 children)

Save money buying just 1 AAAA battery and cutting it in half for two AA batteries.

[–] edgemaster72@lemmy.world 14 points 7 months ago (1 children)

I think they follow Hydra rules, if you cut it in half you end up with an AAAAAAAA battery

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[–] anguo@lemmy.ca 27 points 7 months ago (1 children)

Where they made by Ubisoft?

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[–] Tarkcanis@lemmy.world 25 points 7 months ago (1 children)

It's what 9v batteries are made of. 6 AAAA batteries in a box.

[–] MeanEYE@lemmy.world 23 points 7 months ago

Some are. Others are stacked like this:

[–] drathvedro@lemm.ee 23 points 7 months ago* (last edited 7 months ago) (1 children)

I have a wacom-type pen for a tablet that uses one of those. It was a total pain in the ass the time I was traveling and accidentally discharged it by jamming the button in a tight-packaged bag. Turns out, they are pretty much only available online. No normal shop ever stocks them, not even electronics shops nor radio shacks. Barely anyone even heard of them. Tried disassembling a few 9V's, but all of them were the stacked kind. And with international shipping going 2-6 weeks and me changing locations more often than that, it was an extremely difficult to get hold of them.

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[–] doggle@lemmy.dbzer0.com 21 points 7 months ago (3 children)

The stylus on a surface pro 7 uses one.

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[–] supangle@lemmy.wtf 20 points 7 months ago

it looks like batteries are screaming like AAAAAAAAA

[–] teamevil@lemmy.world 18 points 7 months ago (2 children)

Every single 9 volt battery you've used and original Surface Pen.

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[–] Naja_Kaouthia@lemmy.world 17 points 7 months ago (1 children)

At what amount of As does it indicate the battery is just screaming?

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[–] RobotToaster@mander.xyz 17 points 7 months ago

I had a pen and pad that copied what it wrote onto a palm pilot that used these.

[–] EdibleFriend@lemmy.world 17 points 7 months ago (1 children)
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[–] hperrin@lemmy.world 17 points 7 months ago

I use them in my active pens.

[–] sagrotan@lemmy.world 16 points 7 months ago (5 children)

I despise and ignore battery powered electronics that don't need 18650s. And i use Arch, BTW. :p

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[–] swag_money@lemmy.world 15 points 7 months ago

wacom stylus!

[–] mipadaitu@lemmy.world 15 points 7 months ago (1 children)

Old laser pointers used to use quad-As

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[–] Pulptastic@midwest.social 12 points 7 months ago (3 children)

I have a flashlight at work that uses them. It's a PITA because we don't stock AAAA batteries at work so they have to be special ordered.

[–] Dud@lemmy.world 10 points 7 months ago (2 children)

Wouldn't it be cheaper to replace the flashlight then?

[–] A_Random_Idiot@lemmy.world 8 points 7 months ago (8 children)

the internet has ruined me.

i've seen flashlight twice and keep reading it as fleshlight, and wondering what fleshlight requires batteries.

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Is this what Ubisoft is using to power their development??

[–] hedgehogging_the_bed@lemmy.world 8 points 7 months ago

These are common in Microsoft Surface stylus and my Kobo Elipsa pen uses them but I'd never heard of them until 2021.

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