After I put some tapes and insulated the soldered joints, the modded battery actually worked for a while. But only for a little while then it stopped working. I don't know the reason, maybe the battery didn't sit well inside and the cable got damaged. But this is encouraging b/c I know now it works. One thing to be noted is this battery won't fit with the Tarkan mod and caps. If you have drive thickness same as the stock 30GB HDD, then it will fit with a fat back plate.