Bicycle Dynamo Generator with Dual USB, Wide Applicability Mountain Bike Electric Bicycle Generator Night Equipment for Riding, Blue

I bought this despite there being no reviews at the time, because I wanted to teach my son more about electricity and the idea of using his bike to charge his phone seemed pretty cool to both of us.I was skeptical, but we mounted it and had him ride around for 15 minutes, then plugged in a charging cable and his iPhone started charging!It seems like a simple, cheap little thing, but is durable enough. It’s easy to mount and position into place against the back tire without getting in the way of pedaling, brakes, or anything else.

I put this on a motorized bicycle. It was easy to install but it would not charge my phone. I looked up several videos on it. Mine would act like it was going to charge but never continued a charge. Maybe it was defective from factory, I don't no. I did get a refund so I gave them 2 stars instead of 1. Good luck

Haven't used it yet, but have opened and examined it. Certainly seems durable enough to do the job intended. We live in Tornado Alley and have regular power outages. This is a nice back up to have on hand in case of the extended power outage. So simple to set up and use. Highly recommend.