Just to add to G10 misery! I've just raised a ticket. I had a previous one for a few years and it worked great until the battery eventually lost it's capacity.
I bought a new last Christmas and had only used it a few times at gigs. Since the update it charged initially (despite the transmitter flashing red and never going to orange or green) but was it only lasting an hour or two. Now it flashes red and doesn't charge at all, despite all the various fixes mentioned on this thread. I felt it was worth bringing up as the unit and therefore battery are relatively new and so to me the problem doesn't seem linked to an old battery that has lost some charging capacity already losing further capacity through a safety update...
