My brother had one. It was marketed by Timex in North America as the Timex Sinclair 1000. I don't recall if it had power supply problems, but the crappy membrane keyboard made it all but impossible to use for purposes other than playing around. It was kind of like Samuel Johnson's famous 18th century observation about female preachers. He said that it was "...like a dog's walking on its hind legs. It is not done well; but you are surprised to find it done at all."