Well that is the first pack I've soldered so I still need to get the hang of soldering batteries. I got more batteries to solder but I think I'll use this first pack to get a bit more pratice rather than screwing up all the batteries I have. I was actually quite impressed with run time as well, seems about the same as I was getting with the 7 cell 1900 stick packs with the 17 turn I had in it before.