A MUCH better cable setup for VV+iPhone:
The cable that comes with the Vamp Verza for an iPhone 5 is a short cable thats pretty standard. The issue is that if you have headphones attached, and you put this rig in your pocket or case, the short cable takes a lot of strain since its on the bottom of the phone, and the Vamp's headphone socket is on top.
To make a MUCH sturdier cable, I used a Griffin micro USB cable for $20.99 as well as an Apple MicroUSB to Lightning adapter for $20:
Adding them together and looping them around to connect the Vamp is great, but they need some serious strain relief, provided by a zip tie:
Now the opposite is true when you remove the cable - it wants to push the connectors together, and you may lose the ziptie... so a little hot gluing later, I have a rock solid cable that blows away the POS standard cable: