5 ms·

Back of the envelope calculations. Assume: * solar panel is about 1.5cm x 20cm = 0.003m^2 * Efficiency = 10% * solar insulation is 1000W/m^2 Power = 0.3W

Back of the envelope calculations. Assume: * solar panel is about 1.5cm x 20cm = 0.003m^2 * Efficiency = 10% * solar insulation is 1000W/m^2 Power = 0.3W In 20 min you gain, 0.3x1/3=0.1Wh of energy. Now, these random Sony headphones [1] have 30h life with a battery of 3.7V, 1200mAh [2]. This means they consume 3.7*1200m/30 = 0.148Wh per hour. Seems like claim is roughly in the ballpark. [1] https://www.amazon.ca/dp/B0863TXGM3 https://www.amazon.ca/dp/B0863TXGM3 [2] https://www.amazon.ca/dp/B08YQX76B1 https://www.amazon.ca/dp/B08YQX76B1

reportingsjr 4y ago
To add to this, each apple airpod earbud has a 93mWh (0.093Wh) battery and can in theory last about 6 hours. So, a headband that can capture 0.1Wh of energy in 20 min would recharge about 3 hours worth of airpod listening time. It's definitely in the right order of magnitude, this could definitely be doable. This could make a lot of sense for the student market, where you listen to music/podcasts/whatever between classes and then the headphones get a decent charge when you walk between buildings, walk home, etc.