There are plenty of fancy power banks available on the market. ChargeWrite is a power bank in the shape of a pen. It also has a built-in 16 GB flash drive. You can use it like a regular pen or stylus. ChargeWrite can also be used as a screen cleaner.
The device has a 1000 mAh battery, which lets you talk for up to 5 hours or play video for 4 hours. ChargeWrite can be charged through USB.