I was thinking about ordering the eGo Style 900mAh Battery and some of the reviews reviews state that the connector need to be filed down. Is the connector too deep for certain atty's and cartos to make contact? I was wondering if a V2 Shorty might solve the problem. Also, will the new EMDCC's work on these? Regardless, at $9.99 a piece, it seems like too good of a deal to pass up.