Battery packs take on many forms, including Paick's Noble Power Bank ($65). The shape is somewhat familiar — a rectangular aluminum box with curves — and it's rather thin, making it suitable for slipping into a bag or pocket. Instead of simply exposing the charging ports at one end, this pack features a pop-up tray. Press the black button, and you'll reveal a 2.1-Amp output, another output for 1A charging, and a micro-USB input, to be used with…
