During this summer’s festival season, the hard rock magazine “Metall Hammer” offered a very special service to visitors. The idea was based on the fact that people tend to use their phones constantly for the entire duration of a festival while most open air venues offer only limited opportunities to charge them.
However, what metalheads do all the time at concerts is headbanging! The solution: an “Energy Mosher” headband, which charges the phone via the kinetic energy released when headbanging.
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