Dynamo Hub Not Charging

Voltage and current limits are user adjustable making the unit highly flexible.

Dynamo hub not charging. The amount of power a dynamo hub delivers will depend mostly on the light or usb charger but there are also a few tricks dynamo hub manufacturers use to boost their power outputs. Gps devices tend not to like this displaying a rather annoying lost external power message whenever you stop or slow down. Dynamo hubs paired with powerful usb chargers will provide smartphone levels of charging from about 12kph look for 2 5w on the graph. These are the huge majority of dynamo hubs in use but there are some 1 5 or 2 4 watt hubs that are made.

I use my cinq plug5 plus to top up my iphone ereader head torch gopro garmin gps and 5000mah power bank. Hub dynamo usb chargers are really useful if you carry any battery powered gadgets. The main advantage is that you can optimise your charging current so that your battery can draw a charge at really low speeds eg. Not exactly a light project still something cpf members regularly ask for.

The power from a dynamo hub will drop too low for charging when your speed is below 12km h. From energy that the dynamo delivers. During my visit to eurobike i saw 3 products that enable the rider to charge a mobile phone gps. 100 400 or 900ma for different riding speeds.

A current limiting buffer battery like the smart power pack ii is designed for dynamo hub charging allowing you to switch between set charging currents eg. These are quite low quality and will not work with any of the usb charging units.