Support and General Use > Hardware
1350mAh battery support for iPod Photo
Alexannino:
--- Quote from: torne on August 26, 2010, 06:00:05 PM ---See http://download.rockbox.org/daily/manual/rockbox-ipodvideo/rockbox-buildch8.html#x11-1430008.4 and turn on "Sleep (after backlight off)", so that it will turn the LCD screen off entirely when it's not being used, instead of just the backlight.
That's the only setting that makes a really big difference to battery life, if you use cheap codecs like MP3. If you use an expensive codec, turning off DSP effects (like the equaliser, crossfeed, etc) will help too, but there's plenty of CPU time free to do these effects with MP3s.
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You mean on MP3 320kb/s I can put more effects than only Bass 6 and this do not eat my battery?
saratoga:
--- Quote from: Alexannino on August 26, 2010, 06:07:53 PM ---
--- Quote from: torne on August 26, 2010, 06:00:05 PM ---See http://download.rockbox.org/daily/manual/rockbox-ipodvideo/rockbox-buildch8.html#x11-1430008.4 and turn on "Sleep (after backlight off)", so that it will turn the LCD screen off entirely when it's not being used, instead of just the backlight.
That's the only setting that makes a really big difference to battery life, if you use cheap codecs like MP3. If you use an expensive codec, turning off DSP effects (like the equaliser, crossfeed, etc) will help too, but there's plenty of CPU time free to do these effects with MP3s.
--- End quote ---
You mean on MP3 320kb/s I can put more effects than only Bass 6 and this do not eat my battery?
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Depends how many you turn on, but probably using just a few effects will not have much effect on battery.
torne:
The simple bass/treble controls should use no measurable extra power at all because those are hardware tone controls, and so take up no CPU time. The actual 5-band graphic equaliser, the crossfeed, etc are the things which take up CPU time, and unless you turn absolutely all of them on at once there is very little chance that it will affect battery life on MP3 playback. On more expensive codecs such as Ogg Vorbis, each software effect enabled will have a very slight (but real) impact on battery life.
However, no matter what you do, battery consumption is typically dominated by 1) how much time you spend with the backlight on 2) how much time you spend with the LCD on and 3) how often it has to access the hard drive to rebuffer. The first two are controlled by the display settings, and the third is affected by which codec you use (obviously less music can be buffered with FLAC than with MP3), and also by whether you change your mind about what you're listening to (rebuffering different music costs power, and also changing your mind typically involves turning the LCD/backlight on as well so you can see what you're doing ;)
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