Hi brain trust!
One of my Bosch 18v Li-ion batteries stopped working suddenly this week. After attempting to charge it and not seeing any signs of life in the battery gauge I thought I'd pop it apart and see if there was a bad connection somewhere. There was a little bit more of an issue than that sadly.
So my questions is, does anyone know if this can be repaired and is there anyone out there who can do it? I understand the problems with tagging/soldering to Li-ion cells and not making a hand grenade, won't be attempting the work myself, just want to know if it's a fixer or a recycler.
Ta

Probably caused by trying to slice down a section of steel instead of across it  :-\ 

Looks like a failed cell to me, signs of corrosion, as you say, 'regular' soldering irons don't get hot enough - maybe Roy Fellows can advize?

Yes, poor technique to blame perhaps for over stressing it! Melted the inside of the plastic case slightly.
Replacement battery arrives by courier today anyway so back up to 6 again for those 'little' jobs on hillsides.
BTW, more than happy to pay for any work done. I suspect it's a case of recycle though.

Yow! Nasty. Methinks some of those thin cutting discs will be better next time! But it does look like that's been wet at some point, from my humble perspective.

Here's that handy little jig I mentioned - may have to get one of these:

https://www.machinemart.co.uk/p/einhel-ts-125115l-angle-grinder-cut-off-stand/

Hi Pete

I've soldered plenty of Lithium cells and repaired batteries in the past (I work for Scurion) so I'm happy to do this for you.

Only issue is that the cells will probably cost about ?40 and theres a chance you've blown the electronics. If this is true then I'm sure I can find a use for the cells somewhere as you'd have no use for them.

If you'd like me to do it send me an email at ben.t.wright(at)gmail.com to arrange.

B

Just checked, cells would be $55 including postage imported from Hong Kong.

B

Hmmm. Thanks for the offer Ben but with the exchange rate, not as cheap an option as I might have thought. I've just had a 5Ah battery delivered next day for ?62 so will just put the money into another one of them and recycle this one.
Thanks for the replies guys, even the ones mocking my skill with a grinder. I have already purchased slimmer disks for the next lid.

Free to a good home - 1 x cooked 18v Li-ion Bosch battery. Collection only from Derbyshire.

If those are 18650 batteries then they've got to be worth keeping as spares for lamps.

Maybe. The protection circuit is apparently on the tool body, not the battery packs so I don't know how useful unprotected cells are.

Unprotected cells are very useful. Especially good high-discharge ones as used in drill packs.