Electro's portable charging case can hold 5 cartomizers and 2 batteries. It will also hold the full cigarette you are using. The case will charge 4 batteries from flat to full and features the electro LED battery display. The LED display will show the current battery life and will also show when a bettery is charging and when it is not. Finally the case has a torch on the bottom and quickly charges via USB on the wall or by USB to the computer.