Got these bad boys out of a new power bank - tips on how to remove tabs?

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YYesZir
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Got these bad boys out of a new power bank - tips on how to remove tabs?

I’m new here so still working out how to post pics correctly. Anyways is there a way to remove these tabs or is it better to solder over them? These are brand news LG’s that are doing nothing so I may as well try to use them if I’m able to.

YYesZir
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Been told they have CDR of 5A. Not really any good.

YuvalS
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I used to do it with Dremel with sanding or cutting head but then realized there is no point in doing it and there is no problem use the cells like that  
When you get more experienced you will remove the tabs entirely without leftovers Smile

RobertB
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They are pretty good cells. They run well in a Convoy S2+ or other lower draw lights. I run 3 in parallel in a Fireflies ROT66. Just sand down the sharp edges and run with them

Silent_Star
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I did it with Dremel.

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2A
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I normally leave the tabs on, never had any issues with it. In rare cases I put a blob of solder on top to make it more smooth.

will34
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Are these from a xiaomi powerbank? Then they work well at up to 1C, but not recommended for anything above.

Sirstinky
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I leave them on. Unless you run into clearance issues with or just want them to look nice you can use flush cutters or the Dremel to pry o rd cut them off.

Robin Dobbie
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There’s a nickel or some kind of plating on the cells to keep them from rusting. Sanding that will encourage oxidation.

I haven’t opened too many batteries, but my first one looked like OP’s with the massive tabs. But it’s fine, though. It’s just nickel and the thickness isn’t going to be a problem.

I just opened a different pack. I was careful to tear the tabs off as cleanly as I could. I don’t know if I could have done better?

When I was done, I used a screwdriver shaft to burnish the welds so they’re not rough. One I idea is to make a mini burnisher so the factory wraps don’t get stressed in the process.

Skylight
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I use this kind of cutting pliers: https://www.aliexpress.com/item/32945829748.html

You can cut things very flat with them. They are a bit sensitive and break off easily if you cut too thick wires.

wle
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flat file
dremel
grinding wheel

the metal is not hard, it is a quick job even with a file.
30 sec each
2 on a grinder :”)

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Sirstinky
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Skylight wrote:
I use this kind of cutting pliers: https://www.aliexpress.com/item/32945829748.html

You can cut things very flat with them. They are a bit sensitive and break off easily if you cut too thick wires.

I’ve broken at least 3 pairs of these in the last 2 years from being too physical with them. On soft metals up to 3mm they work great though.

Sirstinky
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Be super careful with filing or sanding. You risk damaging the wrap near the positive end and expose the bare can. Touching the positive end and that bare spot causes a short which is bad. Ask me how I know!

Barkuti
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Some grinding stone(s) with the proper geometric shape, a rotary tool, and subtlety with a little skill is all you need to leave those cells very nice:

 

Something like the above, for example (site link).

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Robin Dobbie
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I guess if I was going to take a rotary to a cell it would be with one of those silicone carbide grinding stones Barkuti is showing. Then the goal would be to touch only the welds and nothing more.

I’ve actually sanded cells before and had one of them visibly rust, afterwards. More of them just didn’t work from time to time unless I sanded them immediately before use.

Once you get rid of the nickel, you never know when you’ll have to sand them again before they’ll work. Just my experience.