This is truly an awesome portable battery charger. The size and weight of this unit is great. It is slightly larger and one of the larger cell phones. It fits great in your back pocket, backpack, purse or computer bag. There are a couple of features that really set this charger ahead of its peers. You can charge two things at once, but even more awesome, you can charge with either a micro usb or a "C" cable. Would recommend this to anyone. I am really loving it.