+1 from me too. I have quadlocks on all my bikes. Outstanding product.

What I've done too is order the iBattz Mojo Refuel battery case for the iPhone 5 that allows you to change the external battery. They have an option to turn it into an armored case like the Otterbox cases. I took that, put the quadlock piece on the back of that and use that for my riding. With that, I have hours of ride time and if I carry another battery, probably an additional 5 hours.

http://www.ibattz.com/products_power_armor_i5.php

Lifeproof mount is bigger and bulkier around the phone plus you can't attach an extra battery anyway.

J.