Update on this. The die hard battery has been doing just fine. I didn't register it right away though. In fact, it wasn't until almost 5 months later that I registered it. This was due to the fact that Bav Technic sucks and can't make a product that's compatible to a modern computer. I went through the ringer with them until I finally returned the cable. Then I decided to just the cable that everyone uses for coding and setup my laptop. I was finally able to complete the battery registration about a couple weeks ago.
09 E90 M3 - Interlagos Blue / Black Novillo / Sycamore Anthracite / Eibach / HRE