Thats being a bit of a drama-queen. I ran my Eve 280's at 7Nm for quite some time. Zero issues. No pull out. And plenty of respect for my cells.
Anyone can torque to their hearts content and get lucky...as you did. 4nm is enough. You can search for the tables that show it. 4nm is equal to 700 pounds of bolt clamp force. 3nm is equal to 500 pounds of bolt clamp force. There have been too many stripped terminals and using caution is better than ending up with a stripped terminal.
All this might work, but the risk is that if the threads pull out further
If the threads pull out then there will be a bad connection that can get very hot and that's a big no-no. There are several ways to help avoid this:
1: Use a thread locker and use studs instead of screws no matter what condition the cells terminal threads are in. If I had thought of using JB Weld than I would have used that instead of Loctite. I think the standard or original JB Weld has the highest tensile strength of anything I looked at. Loctite that doesn't not require a primer would be a good choice too.
2: Do not torque more than 4nm to 5 nm.
3: Used braided busbars or cables for the interconnects instead of solid busbars.
4: Ensure the cells are clamped securely keeping in mind they will move slightly due to expansion and contraction.
I know there are some who have used the hardware that came with the cells. Screws and solid busbars and have so far have had no problems. I am thinking long term use and am concerned for those using the cells in mobile environments. My cells are stationary and I am still applying the steps I posted.