According to Hardware Zone there are two models, PLM01ZM and PLM03ZM.
I bought it for ¥89 (S$19) (excluding shipping) at ZMI official online store in T-mall during their 12/12 sale. The usual price is ¥99 (S$21).
IonBank is the name of the range of portable battery packs from Moshi. Right now, there are 3 products in the category, the IonBank 10k, IonBank 5k with Lightning Connector and IonBank 5k with Micro USB Connector.
The IonBank 5k has a battery capacity of 5,000mAh and has two integrated cables, one of them is either the Lightning or Micro USB cable and the other is a normal USB cable to charge the battery pack. It also has a spare USB port to charge another USB device.