CtronThe charge card is just a convenient iDevice to usb cord that fits in your wallet. This is a battery to USB charger. The idea is that you could use these two things together.
MusicGustoI think the benefit of this over the charge card is the generic USB output which is useful for say an iPhone 5 rather than being locked into a 30pin or Micro-USB plug.<br /><br />EDIT: Sorry, this comment was more tailored towards Ctron