I didn't do any testing of the 10k/7k2d on a bank of batteries. I just tested my 7k2d on single NSB G3100 battery that we use for competition. Only test that might be of some interest the 7k2d @ 1ohms on a single NSB G3100 did 4400w at 11.2v with an impedance rise to 3.8ohms.
I posted music power testing of the 2k5d and 4k2d on the link below. Only problem with my testing is people say that the test is bias because I work for them. But people that know me know I test as fair as possible. I can answer just about anything about a 7k2d or 10k.
http://www.caraudio.com/forum/showthread.php?t=357926&highlight=stetsom+2k5d