10 ms·
But those require a battery, which will only survive so many (hundred?) recharges, no?
by FrojoS 14y ago
But those require a battery, which will only survive so many (hundred?) recharges, no?
- mynameishere 14y agoI think they use capacitors. At any rate, almost anything would be better than "gravity power". Even a flywheel.
- meatmanek 14y agoI'm not sure why you think flywheels would be a better energy store than a bag of rocks. Flywheels have a lot of engineering hurdles that can't be met for $5: - they need to be well-lubricated, clear of dust (which I imagine to be a problem in some of the environments they're trying to sell to) - they need to be perfectly balanced, or the shifting center of gravity will vibrate the housing - sapping away precious energy. - they need to run at high, ever-decreasing speeds, which means generators that can extract a constant power level at different speeds