The Jupio Travel Adapter is suitable for use in over 150 countries and includes a PowerVault power source. Cylindrical Li-Ion automatically charges when you put it in a wall outlet (constant charges). We have incorporated 2 USB outputs, so you can charge two devices at the same time. (Either two phones or one phone and one one touchscreen tablet of your choice). EU connector, JP connector, USA connector, AU connector, UK/Spain connector. Can charge the phone even without the connector. Battery capacity is 6,000 mah, which gives you the ability to charge a phone 2-3 times.