The result of this test was 566 shots over 9:26 hours - good but only the third best time out of five different setups! Placing the camera into playback mode after each shot with the backlight turned off was better (640 shots @ 10:48 hours) and of coarse the best was with the display disabled 100% of the time via the DISP button (811 shots over 13:30 hours).
That's a pretty fancy plastic bag, It would be a shame to punch a hole in one of those.
I had another idea pop up from where ever they all come from. I've noticed that the CHDK battery voltage display seems very accurate. If you watch the battery voltage display, it seems to fall pretty steadily. Wouldn't it be possible to measure the power drain in different modes by timing the voltage drop in the battery?You could probably write it into a time lapse script to log the battery voltage with each shot, and maybe even compute the slope, which would be related to the power drain.
That's a great idea. And in fact, that's exactly what the Battery Miser Intervalometer script does. You can even use the resulting log file in your favorite spreadsheet to draw nice graphs - I'd planned to do that but never got around to it yet.
Could you correlate the rate of change of voltage with what was happening with the camera, like backlight off, play mode, etc.?
If you stop the test at 50% of battery range, it seems resonable that the number of shots available in that mode will be 2x the number taken at the 50% point. There is a parameter to allow you to set that point.
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