Plugable TechnologiesPB-WA5K - 2 Port USB Power Bank AC Wall Outlet Smart Charger

The Plugable PB-WA5K is a lightweight combination high-capacity portable battery pack and USB charger. Whether on the go or at home you can use this portable battery to provide the extra power to keep your portable devices running all day long. The unique design allows you to smart charge your devices and the PB-WA5K's internal battery at the same time when connected to an AC outlet. This gives you the flexibility to continue charging your devices while also recharging the internal battery to use when on the go.