Quicky - Never solder a coin battery! (PWJ252)

[@gordonfreeman320]

Scary. If I have to use coin cell batteries for a project, I almost always use those plastic through-hole CR2032 holders. They work great.

[@PlaywithJunk]

Last time I tried to spot-weld a 2032 and made holes in three of them. Then I used a battery holder, soldered wires on that and wrapped everything in insulation tape 😀

[@dtiydr]

@@PlaywithJunk That is cheating. :D

[@supermarioisacat]

Well yeah. What you don't show is how long the soldering iron was in contact with it. Properly cleaned and fluxed and using a quick hand with good technique, it's entirely possible to solder to a coin cell without it getting anywhere _near_ that hot. Definitely worth a warning to be careful, but the blanket statement NEVER to do it is incorrect.

[@mysock351C]

Boy do these make one hell of a bang. I emptied a waste paper basket into the fireplace that had one of these lurking in the bottom of it. Went off like 30 minutes later and damn near made me deaf. Made lots of really pretty colors afterwards, tho!

[@GothGuy885]

WOW! thanks for the heads-Up my friend! 😵‍💫

[@Aranimda]

Thanks. Soldered batteries are a nightmare to replace for anyone who does not have a soldering iron. I'm glad the battery itself provided the right amount of karma for trying.

[@PlaywithJunk]

Soldering itself is a nightmare without a soldering iron. Like as a screw is a nightmare without a screwdriver... 😉

[@josephcote6120]

I found that out the hard way. I've worn hearing aids since I was a kid. They used these small 1.4 v button cells (type 675). I made an FM transmitter from a kit and wanted to see how small I could make it. Tried soldering to the little battery with my 150 watt Weller soldering gun. First one worked fine, soldering to the larger piece on the back took more heat and it just took off. I found half of it, never found the other part. This was mercury cell days too, so I got a good whiff. :(

[@PlaywithJunk]

I know those mercury cells well. I used to squeeze them open to collect the mercury. There was quite an amount in such a small battery. Childhood memories....😉

[@_Everyone__]

Thanks a lot. I have almost done this in the past, and I'm glad I didn't!

[@MrBrax]

i had no idea coin batteries were that powerful, always seemed like the lowest energy thing possible

[@reddragonflyxx657]

Well, a CR2032 can provide 225 mAh at around 2.8 V, which is 0.63 Wh = 2268 J = 542 calories of energy. With 1 calorie you can heat 1 gram of water by 1 K, so 500 calories can heat 5 grams of water (5 ml, or 1 tsp) from 0 C to 100 C. A CR2032 has a 20 mm diameter and 3.2 mm thickness, which is 4.021 ml. That's mostly steel, which takes about 0.5 J/gK to heat, but is about 8x as dense as water, so volumetrically it's about 4 J/(ml K) (same as water). Inside the cell is typically a LiClO4 anode, MnO2 cathode, and a PC/DME electrolyte, but I'm not going into how those react to heating.

[@jimsvideos7201]

Happy holidays, and thank you for the vivid demonstration!

[@questy44]

I had reflowed a board a couple of times while forgetting I designed a rechargeable coin cell to be on the bottom, got really lucky there

[@PlaywithJunk]

An explosion in liquid solder would be quite interesting 😎

[@video99couk]

Terrifying.

[@wernerviehhauser94]

heating a liquid in a sealed container.... what else did you expect? If you REALLY have to solder a connection to a battery, use a low temperature solder (like 80°C). In all other cases use a battery holder, point welder or conductive glue....

[@PrincipalAudio]

Nice! Something to do on the weekend - getting rid of all these cheapo CR2032s I bought from LIDL that don't work in most devices.

[@1337Shockwav3]

Nice you went through the effort to record this, after it's usually adviced and what I consider common sense. Only info I'm missing is how long you put the soldering iron on there, but I can *fully* understand why you didn't.

[@brookerobertson2951]

The DIY powerwall people were doing such a thing with 18650s a few years ago. Soldering copper wire bus bars. I would be Interested to find out if it would be possible in extreme cases for them to explode.

[@PlaywithJunk]

I soldered 18650s before I bought a simple spot welder. I wouldn't do it again. You never know what damages are done inside. And lithium batteries are dangerous anyway. No need to take that risk...

[@graemedavidson499]

Instant tidy desk!

[@5argetech56]

Yikes!!! That's what battery holders are for... Your protection! I would un solder them from motherboards for that reason!

[@artvnl6345]

Whoops, a long time ago I did solder to coin cells. Nothing exploded luckily 😅

[@PlaywithJunk]

Yeah I did that multiple times.... but one day, bang! Be careful.

[@dosgos]

Other risk is the battery power decreases significantly from the heat. But that is the least of the issues lol

[@aldipower]

Danke für das Video/Hinweis. Da hab ich wohl nochmal Glück gehabt! Hab schonmal eine Knopfzelle gelötet. Ist aber ganz geblieben.. Werde ich jetzt nicht mehr machen.

[@PlaywithJunk]

Ich habs schon mehrmals gemacht. Aber irgendwann kommt der Bums 😊

[@1337Shockwav3]

Geht halt schon, wenn eins weiß worauf zu achten ist, auch schon mehrfach gemacht, wenn auch ungern ... bleibt im Hobby halt immer ein Glücksspiel mit einige unbekannten Faktoren.

[@ketas]

i recall disassembling a random store bought rgb led pen. it had 3*1.5v cells. somehow i put all components in some cup and went to to something else for a while. after some short time i heard loud snap and something flew against ceiling and then fell to the floor. after wtf, i looked what it is and apparently it was half of one of the batteries that shorted out and blew up. i didn't know they can do it

[@jms019]

What chemistry was it ?

[@PlaywithJunk]

CR2032 lithium cell. But I think that's not important. Every cell with a liquid inside will start to boil and explode at some point...

[@douro20]

I used electrically conductive adhesive.

[@PlaywithJunk]

That's certainly a good solution. Does it stick well on the battery or is it neccessary to sand it rough?

[@douro20]

@@PlaywithJunk Haven't had a need to sand it.

[@Sir-Dexter]

nice

[@Andrew_Sparrow]

How long was the iron on the battery? what temp was the tip set to?

[@PlaywithJunk]

250 to 350 degree C, normal soldering temperature. And a couple of seconds is enough.

[@BaronVonBeef]

I'd be interested to see how fast they explode using the already tabbed ones, I've put quite a few of them into gameboy, snes and n64 games without an issue

[@KC9UDX]

It's all about transferring heat energy into the cell where it can't leave. Those tabs are thin enough that they solder easily, and also don't transfer heat quickly.

[@Fafnier361]

knaller.

[@Sine1040]

Also don't try to recharge them, that yields similar results. Ask me how I know.

[@PlaywithJunk]

😎Bang!

[@haralamc]

Bid bada boom

[@mister_milkman]

Don't tell me what to do.

[@PlaywithJunk]

You are free to do whatever you want. 😊

[@mister_milkman]

@@PlaywithJunk For how long did you heat up the battery before it exploded?

[@PlaywithJunk]

@@mister_milkman I didn't make the experiment myself but the battery that exploded in front of me took only a few seconds to blow up.

[@mister_milkman]

@@PlaywithJunk Ah I see.

[@smug_cat1]

No time No stopwatch 😂😂😂 Stop bsing people

[@PlaywithJunk]

From my own experience I can tell you, it only takes a few seconds. I soldered a couple of such batteries without an issue. But one out of ten blows in your face. So better not to do that. No reason to call BS on me.

[@smug_cat1]

@PlaywithJunk So, first off, there is no reason why you should solder a wire on for several seconds Second, I'm not saying batteries can't do that. They will do that. But before that, they will massively degrade. So it's counterintuitive to heat the battery that long. You can definitely solder wires to batteries. Before that you need to know what you are doing at least and have the proper equipment. Acid based flux A hot af iron And lastly pre tined wire Edit: And yeah, obviously tab batteries are way better, and a welder is much better for this kind of work. But if you have no other option, a soldering iron isn’t horrible if you know what you’re doing. Yes, it can degrade the battery, so minimizing heat exposure is important. Using a tab is, of course, the better option, but it’s not the end of the world, and it won’t blow your hands off if you do it the right way.

[@jj74qformerlyjailbreak3]

Not a good idea. Even soldering to nickle strips, hanging off batteries scare me. I prefer the mentioned spot welder at the end. Using a 555 driving a mosfet bank can achieve a makeshift safer way.

[@nex7conny]

Popcoin

[@rocketman221projects]

You should never solder any battery unless it has tabs that are intended to be soldered.

[@ProfessorBidoof]

you can solder a coin battery, if u do it quicky.

[@PlaywithJunk]

A dangerous comment. I did it as quickly as possible but it exploded anyway. The surface needs to reach soldering temperature or your soldering is crappy. Yes it may work a dozen of times but one day it goes boom... 😑

[@ProfessorBidoof]

@@PlaywithJunk Are we talking about lithium or something? Some things come from the factory from china with things soldered on it. maybe not the best example but its doable.

[@ProfessorBidoof]

@@PlaywithJunk Your video also doesnt show time exposed at what temp to the battery so for all we know the clips had u setting the iron on it for an hour. I prefer sockets and contacts not soldering but i think you're exaggerating things on purpose with video editing.

[@PlaywithJunk]

@@ProfessorBidoof Of course it's doable... but still dangerous. And just because the chinese do it doesn't mean it's good practise or safe. It's a different thing when soldering tabs are spotwelded to the battery. But soldering directly to the battery is not good and dangerous, no matter of the chemistry.

[@theaustralianconundrum]

The danger of Lion shown perfectly.

[@PlaywithJunk]

The Lithium is not the problem here. Any coin cell could explode.

[@dtiydr]

"You see a hand granade put in a fire and it explodes soon after" The danger of hand granades shown perfectly. *facepalm*

[@theaustralianconundrum]

@@PlaywithJunk oh!

[@erlendse]

That's no Li-Ion, that's a lithium PRIMARY cell, non-recharge.

[@theaustralianconundrum]

@@erlendse Ok. Thanks.

[@hackbyte]

Noo .. really?? ;) Watching... Srsly .. been there, done that ... some asshole got on my nerves, needing a fresh CR2032 battery on some wires for the laptop of his girlfriend.... Shit ... mine was less violent but with more flames ..... more violet ones too. ;))

[@PlaywithJunk]

Yes! 😎

[@dtiydr]

You need to tell this obvious thing to people, why?

[@Stuart-AJC]

Not obvious to everyone.

[@PlaywithJunk]

Read all the comments and you see how many tried to solder batteries, myself included.People always think it will go right before it goes wrong 😳

[@dtiydr]

@@PlaywithJunk You can but have to know how and many don't I guess.

[@dtiydr]

@@Stuart-AJC Common sense; 300 degree C to a very thin metal case boils electrolyte in the battery very quickly and could cause an explosion if heat is left to long. No one has told that to me.

[@MiettedeThonTomate]

You should have shown a battery-powered welder...

[@PlaywithJunk]

I did.... in my video about the EVA4000 battery repair.