Il problema dell'alimentazione elettrica per chi usa la bicicletta, sia nell'uso quotidiano che per viaggi di più giorni, sta diventando sempre più impegnativo. Serve sempre più energia elettrica non solo per illuminare la strada nelle buie ore della notte ma anche per alimentare il sempre crescente numero di dispositivi elettronici a cui non sappiamo più rinunciare. Questo sito vuole essere un primo passo per provare ad orientarsi nella non sempre facile scelta degli strumenti necessari per gestire in modo possibilmente autonomo le proprie necessità.

The electric power supply problem for people who like to cycle either in everyday use and along trips of several days, it's becoming increasingly challenging. More and more electricity is indeed required not only to illuminate the road in the dark hours of the night but also to feed the ever growing number of electronic devices that we can't live without. This site aims to be just a first step in the attempt to orientate the user in the not always easy commitment to choose the most appropriate tools.

Thursday 10 May 2018

USB Chargers

ALL CHARTS AND INFORMATION BELOW BASED ON 
Fahrradzukunft [https://fahrradzukunft.de/]
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LEGEND
- Ladesleistung in die Akku-zellen = battery charging power [W] 
- Fahrgeschwindigkeit = speed [km/h], all data based on SON28 assembled on a 28” wheel
HIGHLIGHTS&CONCLUSIONS: with some models at 20 km/h it seems to be possible to have up to 5.5W transferred power to the internal buffer battery



LEGEND
- Max Dauerhafte USB-Leistung = max permanent power at USB output [W]
- Fahrgeschwindigkeit = speed [km/h], all data based on SON28 assembled on a 28” wheel
HIGHLIGHTS&CONCLUSIONS: with some models at 20 km/h it seems to be possible to have up to 5.0W permanent power at USB output




LEGEND
- Wirkungsgrad Akku zu USB = efficiency power_battery/power_USB [%]
- Entnahmeleistung am - USB-Anschluss = power on USB output [W]
HIGHLIGHTS&CONCLUSIONS: with some models at 3W USB output it seems to be possible to reach up to 84% efficiency ( ??? )


LEGEND
- Fahrgeschwindigkeit = speed [km/h], all data based on SON28 assembled on a 28” wheel
- Electrische Leistung Dynamo = dynamo electrical power [W]
HIGHLIGHTS&CONCLUSIONS: with some models at 20 km/h it seems to be possible to have up to 6.5W transferred power from the dynamo to the charger