[mmastrac]

Lazy googling suggests 30-50Wish [1]. The gameboy uses about 1W, so maybe a 1:30 ratio of time cranking to playing? Lazy math, feel free to correct.

[1] https://www.lowtechmagazine.com/2007/12/wind-up-your-la.html

[arthurcolle]

1 minute of cranking for 30 minutes of play time seems honestly pretty great. Wish I could do that with an iPhone!

I have been in Miami this last week and went to the Mayweather v Paul fight and leaving there was absolute hell. Phone was at 2%, thousands and thousands of people were all trying to get Ubers at once. It was a disaster. Took two hours to find someone who was headed to Hollywood and then I charged my phone along the way and got another Uber back down to my Airbnb. #salty

Could be a cool idea to have a "dual mode bike" that could let you pedal to charge your phone. Anything like this exist lol?

[Ekaros]

Dynamo lamps have been around for decades if not longer, but they make biking less fun. Output isn't too great either at 6V/3W that seems to be typical. Though it can be bought for cheap 5€ to 36€...