I've been vaping for a few years and LOVE the FIN ecigs that you get with the Platinum Starter Pack at Walmart. The battery on these are only about 45mm long and to buy them you have to buy the entire kit, so I've been looking for something similar where I can purchase the battery by itself and have been unable to find. I refill my cartomizers so I'm not hooked on FIN except for the length, which with cartomizer and battery is only about 85mm long. Does anyone know where I can find some SUPER SHORT batteries like this (preferably 510 but I'm open to suggestions) that I can buy singly?