¿Se imagina cargar su celular mientras se ejercita?, la idea fue posible gracias a un grupo de estudiantes de ingeniería comercial de la Universidad de Atacama, quienes pudieron concretar las primeras bicicletas generadoras de energía. ¿Cómo funciona?, ponga atención.

I’ve written very extensively about the humble dynamo hub over the years, but new data from Skjegg Blogspot uncovers an incredible amount of extra knowledge with regards to both the output power and drag of different dynamo hubs.

These days there are more than 20 hub dynamo USB chargers available! I have listed the key specs from each of these chargers and have organised them according to type (headset, regular in-line and light chargers). Within these categories, you’ll also find them ranked in terms of available output power.

Hub dynamo USB chargers are really useful if you carry any battery-powered gadgets. I use my Cinq Plug5 Plus to top up my iPhone, eReader, head t