ASUS now has their own large-capacity power bank
ASUS has announced their ZenPower power bank, which is aimed at competing with similar powerbanks in the market *cough*Xiaomi*cough*. Anyway, this powerbank has a rating of 9600mAh which is theoretically enough to charge a Zenfone 5 three times or an iPhone 6 twice with some juice left over. According to Endgadget China, the ZenPower uses three 3200mAh batteries and has a protection to keep it from catching fire.
No price has been set as of yet for the ZenPower.