16 s
keys: R replay · Space pause · H record mode · arrows step · URL: ?rec&dur=16&paused&loop

Three days on a charge, at full brightness.

Windows System log, boot and shutdown events · board on 2.4 GHz to the PC · sleeps at or before 60 minutes idle · 2026-09-08 10:20 to 2026-09-11 12:20
Wall clock
0.0h
unplugged to two red markers
PC on
0.0h
ceiling on awake-and-lit time
PC off
0.0h
board asleep for certain
When the PC was on, which is the most the board could have been awakelit blocks: PC on · dark: off
AWAKE AND LIT FOR UNDER 46.8 h · REALISTICALLY 25 TO 40 ONE 18.5 Wh CELL DIES AFTER 13 TO 18 h AWAKE. THIS RAN THREE DAYS THAT BRACKETS THE 32 HOUR CLAIM. CONSISTENT, NOT PINNED TO THE HOUR
PC on 46.8 h of a 74.0 h run, off 27.2 h; the PC shuts down fully between sessions, no sleep states. The board sleeps within 60 minutes of the last keypress, so PC-on time is a ceiling on awake time, not a measurement of it.
At the USB-measured 1.41 W a single 18.5 Wh cell lasts 13 h awake, 18 if the board runs leaner on battery; 37 Wh lasts 26 to 36 · start time from the “almost 8 hours” note at 18:13 on the 8th · CK Tech Check