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Thin film photovoltaic is definitely better on a watts-per-kg basis, but it's no good for the charge-while-you-sleep use case.
by svantana 4y ago
Thin film photovoltaic is definitely better on a watts-per-kg basis, but it's no good for the charge-while-you-sleep use case.
- donjoe 4y agoAlso, most portable devices on the market won't provide you with enough power for charging electronic devices in cloudy conditions. My ideal combination to cover about 80-90% of power needs whilst camping/hiking/cycling would be a combination of water turbine (for rivers or tiny streams) and solar. In case I'd be hiking in an area with no water supply, I'd consider something like a wind turbine. Yet, I wouldn't know why I would want to hike in an area with no water supply ;-)
- causality0 4y agoI'm surprised they don't sell some kind of reciprocating dynamo-type thing for hikers to strap to their knee to charge while walking.
- shard 4y agoDoesn't that just increase resistance to your walking, thus is equivalent to you converting calories to battery energy? Wind and solar would be additional energy over what you brought as stored calories or food.
- rowanajmarshall 4y agoGoing by a random Reddit thread [1], it takes less than 5 calories to charge an iPhone. I think that kind of device is already on the market though. You're not gonna power a heater or aircon through body movement, but devices should be fine. 1. https://www.reddit.com/r/theydidthemath/comments/693daq/comment/dh3ej37/ https://www.reddit.com/r/theydidthemath/comments/693daq/comm...
- Dylan16807 4y agoIt's just a unit conversion, you don't need to cite reddit. A Calorie is slightly more than a watt hour.
- is_true 4y agoThat's why taking a nap is important
- dtgriscom 4y agoUnless you hike the night shift...
- megablast 4y agoBut wind usually drops at night.