Romania-based engineering student Stephen Shepeleff has designed the Q-SOUND Bluetooth solar powered headphones. The solar cell across the top of the headband will recharge two removable rechargeable NiMH batteries with an electric capacity of 800mAh and operating voltage of 1.2Volts. A fully charged headset is able to run for up to 40 hours, running Bluetooth, an MP3 player, or other Bluetooth-enabled device.

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