Dynamo Chargers Outside of the Hub

Dynamo chargers don’t have to be in the hub. Let’s look at some new designs of bicycle dynamo chargers that mount on the bicycle. All of the dynamo chargers in this review are not hub dynamo chargers. I am not against using a hub dynamo charger. I love my current set of wheels and am not open to any changes to accomodate any hub dynamo chargers. So what are the new developments in non hub dynamo chargers.