There is a more recent article about chargers: [url=https://www.fahrradzukunft.de/34/steckdose-unterwegs-9][/url]
Translation according to pons.de:
"But those who need comparatively much USB charging power and are also more comfortable on the move will not be happy if they also want to supply the lighting system. The Velotor SE2 solves this special task clearly the best. When it comes to charging power without light, Igaro D2 and Cycle2Charge V3 plus are clearly ahead. The Cycle2Charge V3 plus is the undisputed price-performance winner."