Nothing is more terrifying than losing power on your phone when you are out in the wilderness. If you are biking to work or on the mountain trails, then you can convert that paddling energy back into electrical power to charge your phone or other gadgets with Siva Atom.
This is a device that can be attached to the back wheel of a bike and powers up the battery as you paddle. The device is weather resistant up to IP-4 standard and can withstand shock and tumbles. There is one thing, however, if your bike has disc brakes the device will not work.
The battery can also be charged both, via AC power and through USB at home or work.
The Siva Atom is priced at $109.99.