I just picked up a night vapor and see it comes with one battery, a stubbier version of the six or seven 1 cell's I have for my PZ champ and corsair....is there any possibility I can use the single cell champ and corsair battery, it is a bit bigger, in the night vapor? Or should I just go and pick up a couple more night vapor batteries. i know I can use the same chargers and I have an eflight 4 battery charger to use as well. Thanks. Scott