Does anybody tried to use Li-Polymer instead of 18650 Li-Ion cells?

[Kamomr]

When I was disassembling PB2400c battery to figure out how to rebuild it,
I realised that I need spot welder to rebuild it.
(I live in SK and currently I cannot find any shops that accepts PB2400c battery rebuild)

But then I thought

'since 18650 cell is 3.7v each, and also one pack of typical Li-Poly is 3.7v.
In addition, 18650 Li-Ion and Li-Poly is basically same thing in different form.
Then why can't I use 3 Li-Poly instead of 6 Li-Ion cells?'

So I asked Google about it, and result was very dry.
It seems like no one tried it, but I think someone in here might think or tried this.

Is it possible to use Li-Poly instead of 18650 Li-Ion cells?

 

[3lectr1cPPC]

Not sure about your main question, but - I'm fairly sure that the 2400 battery's BMS will lock down and stop working if the cell chain is broken for a rebuild, meaning that it won't work either way. You'd need some way to reset the BMS, which there appears to be software out there to do, somewhere. Companies exist that can reset the BMS and rebuild these batteries, but I've never been sure what software they use to do it.

 

[Powerbook27364]

It may be possible if you can keep the BMS alive. It would be more difficult than 18650s since with 18650s, you can just copy the original layout while powering the BMS. With Li-Po packs, you would have to first get cells that fit, then wire them correctly (which would be more challenging), and while doing it, you have to keep voltage to the BMS so that it does not lock. I have considered rebuilding my 2400c pack (once I fix the display and inverter problems), but never considered Li-Po because of the challenges it poses.

There may be some people on this forum that could do it, but I havent seen Li-Pos used in any powerbook rebuild before. It would certainly be interesting to see the process and maybe try it myself some time.