It's a small battery charger probably more suited for a top up in your backpack or purse. Nicer than a big clunky charger sitting on your table in a Cafe. It's not large enough capacity to be suitable for travel or last you for a day of major phone use. I wouldn't recommend it for any major trip as a backup. After the initial charge which takes a few hours the device charges quickly. I like having the cords attached and the various options for input and output. So it's great for specific use but limited for excessive consumption.