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I think my dynamos have generated more elec than half a dozen AAs and will continue to do so until. It's not just about carbon footprint there's the chemicals within the batteries and the physical waste.
Yes, but there's no such thing as a free lunch. The energy has to come from somewhere. In this case you have to eat (even) more food (7 Days croissants) to generate the power, rather than taking it from a plug into a power bank. I reckon you are probably less efficient than the average European power station so your dynamo will have a higher carbon footprint per Watt.
And your dynamo took resources to manufacture. As do AAs and power banks. None of us know what the relative amounts are but, the rule of thumb is that more complex and more expensive something is, the more resources and energy it takes to produce it. So, I would be willing to bet that many times more resources went into producing your £x00 dynamo than my 4 power banks and 4-pack of AAs from Poundland!
frank9755-
Oh no! I have to eat more! There's a nice problem to have for once.
I eat more food, you use more power off the grid. I burn kebabs, you burn coal.What happens to my dynamo when I finish the race? I use it to commute to work with for the next 5 years. What happens to your powerbanks and collection of AAs?
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I've understood the powerbanks are actually not that effiecient, some power is lost on the way. And lithium is problematic. The price of a dynamo probably comes more from the hours spent making the complicated parts. And you probably won't need to eat any more than you would otherwise as you're putting out as much power as you can anyway, you'll just be that much slower.
hippy
Samuli
I think my dynamos have generated more elec than half a dozen AAs and will continue to do so until. It's not just about carbon footprint there's the chemicals within the batteries and the physical waste.