This morning I noticed Carl’s last two “playtimes” were reduced by roughly 36 minutes (5.6h normal, 5h and 4.9h these two playtimes).
Analysis: I left the microSD adapter and card attached after performing an rpi-clone backup yesterday. I tested the additional load - 0.37W = 37mA at 10v or roughly 70mA from the USB.
His normal power load is around 3W but becomes 3.4W with adapter, so the current 17WH battery pack capacity (playtime from 11.2v to 8.1v) which normally lasts 5.6 hours was cut short by 36 minutes.
How come they didn’t give these kinds of problems to analyze in high school (1970)?