Motorola defective product - does not turn on! Nationwide

I purchase Motorola's Roadster 2 product, a Bluetooth speakerphone to use with a cell phone for handsfree communication.  The problem is, often the product will not power up.  Occassionally it works fine, but most of the time it will not power up, so the problem is sporatic.  Even when the unit is fully charged, and even when it is plugged in, it simply will not start - turning the power switch off and then back on does nothing.

I reported the problem to Motorola and they immediately offerred to exchange it for a new one, which I did.  But now the new one does the same thing!  So clearly there is a problem with the product.