Direct Link: http://www.verizonwireless.com/b2c/store/accessory?action=accessoryDetails&accessoryId=47724
I grabbed one as an extra since I'm out in the field for up to 12-16 hours depending on what we're doing.
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"There is an art to flying, or rather a knack. The knack lies in learning how to throw yourself at the ground and miss. Clearly, it is this second part, the missing, that provides the difficulties." - Hitchhiker's Guide to the Galaxy