On Feb 11, 21:29, Tony Duell wrote: It was an Acorn/BBC Master 128, but it only happened once, and it didn't make a hole. However, it did happen in a teaching hospital, so there was rather a lot of fuss about it. When Acorn realised what had happened, they recalled all the lithium battery packs and replaced them with Duracell packs. I worked for Acorn at the time, and was peripherally involved in the recall. Basically, I had to contact/visit all the dealers, education authorities, and service centres in my patch and make sure they surrendered all the lithium packs, both in machines, as held as spares, in exchange for the replacements. Acorn didn't want to risk any repeat performance. I can't remember much of the detail now, but I do remember having a lifetime supply of 3V AA lithium cells (non-rechargable variety). Unfortunately, "lifetime" means "shelf life" :-( -- Pete Peter Turnbull Network Manager University of York