If you do not like charging from a USB port, perhaps because it limits your options then this adapter should suit you. It will allow you to change a USB to the main charger and has many different sizes of USB ports to choose from. This means that you can charge your electronic cigarette batteries using main electricity and they will charge up quickly and reliably. The design of this adapter means that if you do not have a USB port or you just happen not to have one available to use, you will still be able to charge your device. For then cases, when USB charging is not possible or not convenient, this can provide a much better option for you. It means that if you find yourself somewhere without a USB port, you can use the adapter to charge from the main electricity.