Compatible Cartomizer type for Elektro e cig? 306 510 or 808?

[Anon]

which cartomizer will fit my Elektro e cig battery, a 306, 510 or 808?

thanks

also if you are familiar with Elektro cartomizers, i put a brand new cartomizer on a fully charged battery and the light flashed 3 times, tryed the same cart on both batteries, same thing happened, i think i threw out the manual, so im not sure what 3 flashes means, its the first time that happened.