Yeah I figured that..I wasn't thinking the carts would last longer..I was asking if they last an even shorter time actually, but I'm sure it's about the same as with a regular 901 battery. Thanks! 
and justin... sadly producing vapour uses liquid.. please folks dont think its capable of making micky mouse carts last longer.. it isnt.. regular topping up is needed.. its easy to do with the dripper bottle..
trog