thank you for the post.
I know this is an old post but I found it when looking for my own problem of a new battery not being recognised in an old Studio 1737.
The original battery was only lasting 15 minutes so ordered a new one from ebay (A third party low cost one bought Jan 2014), Plugged it in and got the message, "battery not recognised, laptop will not charge the battery"
After searching a few sites for an answer, I tried updating the BIOS (new battery was still installed at this point. The update went from A02 to A05 and it worked a treat, no more message. Battery charges fine.
I am not saying that was Spiderxx's problem but it certainly worked for mine.