OK. When you get it fixed, I'd be interested to read if also in practise can be charged through N900 microUSB and N900 software doesn't go nuts because it takes longer time and resistance may be little different that with single battery. I'd be most interested in the mod, where there would be another battery connector coming from the case parallel and before the original battery connector. In this page, the obvious place where two cables would be soldered is seen. N900 is disassembled http://sites.google.com/site/svcr0c0/n900 In this pic the obvious place where two cables would be soldered is seen. Right behind the original connector and then lead cables somehow nicely through the plastic cover still leaving them under back cover: http://6179764254964084683-a-1802744...attredirects=0 Or better yet, if some manufacturer would make tiny enough pass through connector so 1st battery still would fit in and 2nd battery would nicely clip on top of it to its own connector.