Comments on: All About The Best Dynamo USB Chargers For Bicycle Touring and Bikepacking

By: WCC

WCC — Wed, 06 Dec 2017 16:10:00 +0000

Any thoughts about charging from a dynamo built in to a small (16″ iso 305) wheel? We’re planning on doing our charging from a Bob trailer’s wheel.

By: Alee | CyclingAbout.com

Alee | CyclingAbout.com — Sun, 01 Oct 2017 23:30:00 +0000

In reply to Poul Hansen. Fahrrad Zukunft conducted the testing. I've never had an issue running my iPhone directly from my Plug III, but if you are concerned, you can always add in a cache battery to your dynamo charging system.

By: Poul Hansen

Poul Hansen — Sun, 01 Oct 2017 13:41:00 +0000

I would be nervous charging an expensive mobile directly from the dynamo and I have never seen any tests of the output voltage(including spikes) of any of these 5V USB charging devices. Did You test this?

By: Alee | CyclingAbout.com

Alee | CyclingAbout.com — Wed, 27 Sep 2017 12:06:00 +0000

In reply to Tom Shield. Noted! I'm trying to keep it all as easy as possible to understand in a practical sense, so might go with hub drag.

By: Tom Shield

Tom Shield — Wed, 27 Sep 2017 00:16:00 +0000

Resistance as you are using it is a very poor choice, especially with electrical in front of it. You mean it similarly to air resistance, so a much less confusing choice would be input power, or to be even clearer, mechanical input power. Hub drag as Simon and you discuss is also a better choice, but drag typically implies completely lost power, which this is not.

By: kamaz

kamaz — Tue, 26 Sep 2017 16:57:00 +0000

e-werk is crap. wouldn’t recommend it to anyone. get sinewave

By: Alee | CyclingAbout.com

Alee | CyclingAbout.com — Tue, 26 Sep 2017 08:28:00 +0000

In reply to Simon Wile.

The drag is very low when there is nothing drawing power: https://www.cyclingabout.com/dynamo-hub-drag-lab-testing/

By: Simon Wile

Simon Wile — Tue, 26 Sep 2017 07:28:00 +0000

Thanks Alee 🙂 does the hub add drag all the time or only when powering a light or battery?