So a friend of mine gave me a Sena SMH10R that was still new in the box. It's exhibiting the same problem others have had in that it won't turn on when only powered by the battery. If you plug it into a USB port then it works fine. I contacted Sena and of course they won't warranty it or even repair it. I've tried all the firmware upgrades and device resets, but nothing work. Probably has a broke wire coming from the battery. Does anyone know of a place that repairs these or should I just by a new Cardo Pactalk? Thanks!!