Lontano 3.9inch ABS Bicycle Chain Pedal Generator Dynamo Charger to USB 1000mAh - Black

I used this product to provide charging for my phone while riding the bike. It never provided sufficient charge to keep my Samsung Galaxy 5 charged. In addition, the slider design was too stiff to let the chain freely move from the lowest gear to the highest. It would "hang-up" and rattled terribly. I kicked it lightly with my foot to free it and it worked several times. However, on the second day of the ride, the last time I kicked it lightly, the entire mechanism moved rather than the slider and it caught a spoke. This ripped it off of the bike and busted it into three pieces. It also broke the spoke. It was not built to handle 50 miles per day.

Works well. Chain driven for quiet operation. Cannot be installed on bikes with multiple front sprockets.

Would give a “No Star” rating, if I could. Won’t even attempt to charge my iPhone (or anything, for that matter), have no idea if it really even does anything more than barely light up its own LED. Plastic mount and screw won’t sufficiently tighten, VERY poor and sticky axis movement (plastic-on-plastic). I’ve had to just take it off, as it’s nothing more than a noise-maker.

This was my second attempt; it failed just like the first. They both got caught up with the chain and came apart. I was never able to charge a phone with it. The charging percentage never went beyond 4%. Simply useless.