getterflash, I've typically seen impedance readings of 1.4 to 2.5 on "reasonably fresh 5000 mah" 5s packs from most of the retailers over the last 6 years. The numbers have been lower to start with on the newer brands that have become available for purchase during the last year or so. Yes, the individual cell numbers do go up as the packs age. As I stated in another thread here on RCU, I've been lucky to get 75 flights out of most of the packs I've purchased. Note, I ALWAYS charge at 1C. IMHO, the quality of most lipos is getting better! Someday, I hope to have packs that will indeed do 600 flights as advertised! Regards, Everette