Good afternoon everyone.
I had a 3 years old harmony one remote that stopped working/ charging and had coloured bubbles on the screen, along with a swollen battery that could not be removed...
I emailed logitech and after supplying purchase details, photos and serial and model numbers, I have just received an foc logitech touch remote.
I could not find any reference to this issue on this site, but google has reports of the swollen battery issue.
Hope this helps others.