Rockbox General > Rockbox General Discussion

Battery Utilization observations/questions --- (not again!!!!)

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TexasRockbox:
Hello,

I'm a Rockbox newb (but have designed a WPS)  and an ipod less-than-newb.  In another topic it was mentioned that we don't have all the ipod information therefore we don't know what is exactly being turned on or off by Apple and that the battery indication is unreliable in Rockbox.

OK?

For fun, I booted to the Apple ipod mode and went through their menus and turned "OFF" anything that was turned "ON".  Everything I could find, maybe I missed something.  Even turned down the brightness control all the way to lowest setting.

Still with me?

I boot up to Rockbox (using my own WPS as I was before) and what was once 4h 49m of battery time left is now 14h 0m.  Is it possible that some or all of the "OFF" settings in "ipod-mode" are still in effect in "Rockbox-mode"?

Am I being fooled?  I guess we'll find out 14 hours or so later.

Thoughts?

Llorean:
The estimated time remaining in Rockbox is not at all accurate. And when they said "turned off things" they meant specific pieces of hardware, not software functions as most of those are. For example, properly shutting down the USB hardware when it's not in use.

TexasRockbox:
OK.

For experimentation purposes anyway I've used it slightly over three hours and the battery remaining shows 73%.  All .OGG files, a 7/16/07 build.  Minimal navigation or lighting up the display.

From previous usage, to me, the battery estimation is done "on the fly" and is adaptive.  That is, the more one navigates or lights up the screen, the battery estimation drops quickly, but if that kind of activity is stopped, the estimated battery usage decreases and the time time remaining actually increases.

What has me intrigued is that previous to the "ipod-mode" changes the display the battery life was a consistent 4h 49m (100% fully charged) until those "ipod-mode" changes.  Then the sudden leap to 14h 0m.

Llorean:
Look, the best way to do this is full battery benchmarks using the plugin so that we can see the actual voltages over time. Both percentage readings at any given time and the estimated time remaining are known to have inaccuracies, so please simply create full, proper battery benchmarks.

TexasRockbox:
I'll do that when this charge runs out.   Thanks.

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