Thanks for letting me know I will not post just for count to get to the other forums from now on! Serious question though.. I ordered 4sony vtc4's for my sigelei box mod what is the best way to alternate the batteries? I also heard you should switch battery slots in your mod at 50% battery life cause one battery dies faster than the other is this true? Just trying to figure out the best way to alternate the 4 batteries for my mod I'm numbering one set 1 and 2 and the second set a and b so I know I have 2 sets and can alternate the right way but how should I alternate my batteries? And should I let the batteries totally die before I change them or no? Thanks!