You know what Matt, try the "D" tip. I tried plugging it into my P2 and it seemed to fit, I just didn't ry to power it up. I always assumed their was a standardized size list, but in trying the Tekkeon tips it doesn't seem to match what I thought was a conventional system. For DVD batteries and the bixnet battery I posted a link to the "M" tip is the right tip, so if the "D" tip doesn't work for you then try to get a "M" tip.