Comment on Solar powered personal umbrella with battery?
xavier666@lemmy.umucat.day 2 weeks ago
- portability
- cost
- efficiency
- return on investment
- market size
I think the umbrella did not satisfy all these parameters enough for it to take off
Comment on Solar powered personal umbrella with battery?
xavier666@lemmy.umucat.day 2 weeks ago
I think the umbrella did not satisfy all these parameters enough for it to take off