I've been using V2 battery and liquid for over 8 month's then switched to a aspire K1 starter kit which is so far superior to V2 but I kind like the smaller size of the V2 batteries is there any starter kits that are around the same size of the V2 ( size of a cigarette ). I would stick with the V2 battery as a back up for inconspicuous vaping but the battery life is terrible.