Anker Astro 3E 10000mAh External Battery (Black)
I confirm that this charger works with the provided ASUS charging cable and with a Samsung Galaxy Note 2 white charging cable.
I set the Anker Astro to 12V (iPad setting on the Output S port which is 3A) and it charged my T100 an additional 70%.
This is good if you cannot access a wall outlet and are on the go for emergencies longer than 10 hours.