There are a few ways to keep your phone juiced as you ride. Those with foresight will have specced a wheel with a dynamo hub and USB adapter. Those who live in sunnier climes might opt for a solar panel. ANd those who lack both good weather and good planning skills can grab the Tigra BikeCharge, an iPhone charger that will fit any bike.
The BikeCharge fits to any spoked wheel, slotting onto the axle between the hub and the fork. Once clamped into place, you slot the “clutch” over a spoke and attach it to the body of the unit, letting the movement of the wheel spin the dynamo.
And that’s it. The half-kilo (about a pound) unit provides enough power for any USB gadget and a range of handlebar mounts can be had for various phones, including the iPhone.
The charger goes for $120, which isn’t far off the extra you would have paid to get a proper dynamo hub. Then again, you can quickly swap it between bikes. Available now.