I have KR8 batts from several vendors.. do these have conditioning issues? I ask because sometimes they start off strong and power the cartos producing a good vape and then their "power" seems to drop like a stone.. and sometimes they will last maybe 2 hours of moderate usage.. and other times like 45 minutes and they are needing recharging.. the batts seem to be the most frustrating part of the KR8 2 piece.. or are some vendors batts better than others.. any recommendations? I have 4 in the rotation now and I would hate to throw good money after bad and buy more if they are all mostly the same.. I like the cartos.. should I invest in a Elegant or some other higher mah batt that can use cartos? Suggestions welcome.. hmmm 3 questions in 1.. grin