The ChargeCard is essentially a card with a USB connector on one end and a 30-pin dock connector on the other. The USB connector can be folded back in when not in use, making the ChargeCard as slim as a credit card which you can store in your wallet without any trouble. And that’s basically it. The only problems I see with this device is not being able to use your iPhone to talk while it’s charging (unless you’re planning to chat on speakerphone or use a headset).
Unfortunately it’s still short of its goal ($50,000) on Kickstarter but it has 38 days to go. If you’re interested in picking up one, head over to Kickstarter to pledge your pre-order for $18.