I notice you don't sell DPV9 (KR808) batteries, but you do carry 901 batteries. I know the two are thread compatible, but some 901 batteries don't work well with KR808 cartomizers because they don't have air holes. Will your 901 batteries work with DPV9/KR808 cartomizers? Do you know if the 901 batteries run at 3.7V (standard for KR808) or 3.2V (standard for 901)?