Emie Fast Charging Power Bank, Power Note 5200mAh Compact External Battery Portable USB Charger for iPhone Samsung Android Cell Phones Emie possess the Note with binder holes to make it convenient to carry around with your book. The Power Note is similar to A6 paper in size. It fits into your traditional binder notebook perfectly, just like a sheet of paper. Its light weight makes it convenient to carry around. This 5200mAh capacity battery comes with a USB charging cable on its side to help eliminate wire tangles. The programmed circuitry provides protection from overcharging, reversed connecting, short circuit, etc. It's compatible with a large range of electronic devices including iPad, iPod, tablets, and mobile phones from Apple and Samsung.