this post was submitted on 27 May 2026
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I went off the power supply maximum output. 5.1 volts, 3 amps, so 15 watts per hour. 24hrs per day, 365 days a year, so 131,400 watt-hours, or 131kilowatt-hours. My electricity is about $0.25/kwh (advertised at 0.09/kwh, but when you add on bullshit fees, the final rate is much higher), so I came up with $32.85 as the maximum amount any device connected to that power supply could cost.
Yep. But that would be 100% CPU, 100% of the time? Real life, it's probably closer to 2w idle and maybe 5-7W under typical load.
More interesting...I think that technically means you could make a "UPS" for it using what...4xAA batteries?
Oh man...that would be cool. Stupid but cool.