Ok, so I don't have the most advanced technology. I am currently on a student budget so I am working with a Panasonic Toughbook CF-47 (Pentium II) Laptop, it's fast as it has plenty of memory and a cable internet, not bad for a pentium II. So, I have had this laptop for about 6 months and the battery was doing good everytime I would take it somewhere and eventually recharge it. It finally died for good after it was completely discharged like a week and a half ago. I jumped on ebay and bought another one just like it. The seller was selling like ten of these total. I bought one, it just came today but...GUESS WHAT?...it still isn't working!!! It does better than my original battery in that it starts to charge with the yellow/orange led light, then a minute later it goes straight to flashing red again, instead of just staying red like the other. I need to know if it's this used battery or possibly my old computer. Would anything other than another dead battery cause this? Should I send it back or have the battery looked at locally? Any suggestions! -gameplan (noob)