Dear Patrick55, First I was thinking it was also my BIOS and was using linux and windows 7. I did open the battery very carefully and saw a cell was completely dead (0 volt), also open the dvd-shape spare lithiumbattery. Did try to charge the cells separate on a constant current / constantvoltage powersupply. Some cells fall back in voltage within any minutes and when I placed the battery back the notebook tells sometimes for some minutes to charge the cells but that's not. They discharge and after 1 hour the same results. I did get from Medion BIOS updates, I think it was for Windows 8 and another version but I´ ve only Windows 7 and using now only Linux Mint 17.2. An other thing since I buy my Medion notebook I did remove the lithiums both, never use them and store them for 3 years and that's not good. Selfdischarging destroy the lithiums and you must regular charge them. But now, on Ebay I saw a seller in Germany and did buy the round batterypack for a good price and now everything is running well without any bios-update in several linux mint versions but also windows 7. Since a short time I did remove Windows 7 completely. So the solution for me was to buy a brand new accupack on Ebay. Greetings, Roel, Netherlands website http://pa0rbc.atspace.com/index.html
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