The new handset is called Asus ZenFone C, and is a slightly larger successor to last year's ZenFone 4. Running Android 4.4.4 KitKat with ZenUI on top, the ZenFone C sports a 4.5-inch display with 480 x 854 pixels, and is powered by a dual-core Intel Atom Z2520 processor clocked at 1.2 GHz. Other features include a 5 MP rear camera, VGA front-facing camera, 1 GB of RAM, and 8 GB of expandable internal memory. Measuring 136.5 x 67 x 10.9 mm and weighing 149 grams, the smartphone comes with a 2100 mAh battery.
The ZenFone C has several color versions (including black, red, and white), and is already available in Taiwan, where it costs just $95.
As for Asus' new portable battery charger (or power bank), this is called ZenPower 9600, and obviously has a capacity of 9600 mAh - so it's capable of charging most smartphones at least three times. It will be soon available in various color versions (black, silver, red, cyan, etc), but it's not clear how much it's going to cost.
sources: Asus Taiwan, Engadget Chinese (translated)