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I sent it to guys that regenerate laptop batteries, but next time I will do it on my own because you basically replace the cells, weld them together and its done - here [1] you can find detailed guide for Libretto.

[1] https://webcache.googleusercontent.com/search?q=cache:frP4SG... (from cache as it doesn't seem to work right now)

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Be extremely careful if soldering Lithium-Ion batteries together, as getting them too hot (which isn't very hot compared to soldering!) can easily cause them to burst into flames or explode...

welding != soldering

I'll second that...

Now, I'll say, after 30-40 batteries, I've never had one catch fire. I've had a few that I probably broke as a result of heat, and I suspect that if you've tested the cells carefully and the batteries are in good condition, that they tolerate the brief heating better than cells that are already damaged, but that's not something I'm willing to bet my shed or my body on.

When you said regenerate I thought you were doing some prices on the existing cells, rather than just replacing them. Thanks for your reply.

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