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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[–] [email protected] 128 points 8 months ago (6 children)
[–] [email protected] 45 points 8 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_ 71 points 8 months ago* (last edited 8 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

[–] [email protected] 46 points 8 months ago

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

I reject your edit and substitute the original assumption

[–] [email protected] 18 points 8 months ago* (last edited 8 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!

[–] [email protected] 12 points 8 months ago

Some have stacked flat cells IIRC.

[–] [email protected] 12 points 8 months ago

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

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[–] [email protected] 102 points 8 months ago (5 children)

But.. does the mythical A battery exist?

[–] [email protected] 68 points 8 months ago (2 children)

Every battery is a battery.

[–] [email protected] 12 points 8 months ago (3 children)

Most "batteries" are in fact cells.

[–] [email protected] 8 points 8 months ago (1 children)

This is why humans make good batteries.

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[–] [email protected] 10 points 8 months ago* (last edited 8 months ago)

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

[–] [email protected] 16 points 8 months ago* (last edited 8 months ago) (5 children)

It would appear ~~so~~ not.

[–] [email protected] 18 points 8 months ago* (last edited 8 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.

[–] [email protected] 16 points 8 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

[–] [email protected] 14 points 8 months ago (7 children)
[–] can 18 points 8 months ago* (last edited 8 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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[–] [email protected] 56 points 8 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.

[–] [email protected] 12 points 8 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.

[–] [email protected] 8 points 8 months ago

I'm fairly certain you can take apart most 9 volt batteries to get at the AAAA batteries inside

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[–] [email protected] 38 points 8 months ago (2 children)

There are six of these in some 9V piles

[–] [email protected] 31 points 8 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.

[–] [email protected] 8 points 8 months ago (1 children)

Certain lantern batteries are filled with AAs as well

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[–] [email protected] 33 points 8 months ago

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

[–] [email protected] 29 points 8 months ago (1 children)

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

[–] [email protected] 14 points 8 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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[–] [email protected] 27 points 8 months ago (1 children)

Where they made by Ubisoft?

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[–] [email protected] 25 points 8 months ago (1 children)

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

[–] [email protected] 23 points 8 months ago

Some are. Others are stacked like this:

[–] [email protected] 23 points 8 months ago* (last edited 8 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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[–] [email protected] 21 points 8 months ago (3 children)

The stylus on a surface pro 7 uses one.

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[–] [email protected] 20 points 8 months ago

it looks like batteries are screaming like AAAAAAAAA

[–] [email protected] 18 points 8 months ago (2 children)

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

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[–] [email protected] 17 points 8 months ago (1 children)
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[–] [email protected] 17 points 8 months ago

I use them in my active pens.

[–] [email protected] 17 points 8 months ago (1 children)

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

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[–] [email protected] 17 points 8 months ago

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

[–] [email protected] 16 points 8 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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[–] [email protected] 15 points 8 months ago

wacom stylus!

[–] [email protected] 15 points 8 months ago (1 children)

Old laser pointers used to use quad-As

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[–] [email protected] 12 points 8 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.

[–] [email protected] 10 points 8 months ago (2 children)

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

[–] [email protected] 8 points 8 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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[–] [email protected] 9 points 8 months ago

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

[–] [email protected] 8 points 8 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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