Do you have a link to what you bought? I'm pretty sure the mega battery fits the same atomizers or cartomizers as any other 510 battery, so I don't see a problem. As long as the cartridges you
buy fit into the atomizer, the atomizer should work fine with the battery and you'll be able to use them.
To be honest though, the atomizer/cartridge setup isn't a very good way to go. You might consider trying dripping while you wait for your order of cartomizers to arrive. Just sayin'.