3 ms·
This nerd sniped me and I had to do the math to confirm, but you're right, at least depending on where you get your estimates and regional power costs. The ener
by delecti 3y ago
This nerd sniped me and I had to do the math to confirm, but you're right, at least depending on where you get your estimates and regional power costs. The energy equivalent between a cell phone and shower time is on the order of seconds.
My phone's battery is 4385 mAh @3.7V, or 0.016 kWh, and my power costs $0.1252/kWh, or about $0.002 per phone charge. Based on some super surface-level estimates from googling, a typical shower is about 2 gallon/min, and the cost to heat water is about $0.01-0.02 per gallon, meaning for me it's actually about 4 seconds of hot water per phone charge.
- wryanzimmerman 3y agoAnd the parent comment said “47% wasted power … extra second … would offset half of that” and 47% of four seconds is about two, half of that is one second, so I’d say that was shockingly accurate, wow!
- asolidtime1 3y agoYeah, the math I did was for heating water by 50 kelvins for a 9 l/min showerhead, which in hindsight was probably overestimating it. It'd make sense if the actual answer for most people was 2-4 seconds