How to solder 18650 Li-Ion batteries

How to solder 18650 Li Ion batteries with soldering iron at home.

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[bro_leo]

Everytime I saw video like this, I go to the comments and look for someone who arguing about "don't solder on lithium ion battery". There are always people say the same thing..

Well, you are quite right (for someone who really have enough budget to buy spot welder devices), but also you are not really right. You can solder on battery if you know what are you doing. The correct advice is "Don't solder too long on the battery until you overheating it". That's why you have to learn some soldering techniques to let you avoid soldering on the battery too long. You can even solder as long as the spot welder weld metal on the battery terminal if you learnt the right technique and use right flux and material. I did this many times already. I have a solar power bank using soldered connection batteries, it still works from 2020 until now. Only downside of soldering is, the connection not really neat compared to beautiful spot welded connection.

[christopherleubner]

Easiest way to do this. Use a Dremel sander to clean the battery. Apply a smear of plumbers tinning flux, then touch with a very hot iron and 63/37 tin lead solder. Do it hot and fast.❤

[JoeRodge]

This is just fine. You may slightly damage the internal structure.

But what I say... is that by removing that outer-coating that the solder won't adhere to, will rust. Guaranteed.

[ChibiKeruchan]

Dude buy a D tip (flat head)
and fold your solder so you can melt twice as much in one go.

these 2 tips will help you cut your soldering time to half.

[pequodexpress]

I need to do something like this to add a nib to the positive terminal so that my 18650 cells work better in an LED headlamp.

[jasonvoorhees]

The fact you soldered successfully with a conical tip (which has less surface area compared to others) amazes me.

What temperature did you apply? Because I’m having a very hard time doing this even with the highest temperature 450.

[itzpogboy]

U shouldn't solder but if you do make sure to do it quick and blow air to cool down ❤

[eivis]

Please don't do this. It's fine to solder that strips on pouches if you can't weld, but cell type batteries have to be welded or nuted.

[UpcomingJedi]

If you cant afford a welder, you shouldnt be buying these cells. Just pay the store so someone who knows how to do the job right canconnect or put tabs on your cells Welders are cheap asf these days to do it right. Ive soldered on ni cds before i got one and yhey usually didnt work afterwords. What happens when you try connecting these? You gotta heat them yet again to connect the wires. They of course wont fit in a battery holder anymore

[Dominik_Lnk]

SOLDERING ON BATTERYS IS DANGEROUS use an sot welder and nicle strips .
If u heat the battery to much it can explode .

[Chowmein]

Gotta have a lot of money treating those $16 a piece batteries like that😭😔

[samueldavies]

Even if the battery doesnt blow up in your face you can greatly reduce the capacity

[danielmetzger]

Do not copy this bungling. Use a spot welder (not expensive) and nickle strips.

[Lee-haw]

Whatever i do, the solder never hold on the battery surface, i tried scratch it, and also use of detergent acid on it, , but the solder never hold. It always break.

[thekhan]

soldering paste laughing at corner 😂😂😂

[davidezaffalon]

It's dangerous to expose the battery at a high temperature even if it's for some seconds..

[abedin]

you should never solder a lithium io battery, you can SPOT WELD OR HAVE SOMEONE SPOT WELD TABS FOR SODERING.

[Ultimateharen]

Use battery holders much better and safe

[leo]

as long as the battery has no more mAh