Support and General Use > Hardware
Sansа Clip Zip - Improve battery life
saratoga:
--- Quote from: 404_user_not_found on December 15, 2014, 01:17:12 PM ---Looks strange, but "improve_battery_life.patch" improves sometimes decode time and lowers MHZ needed for decoding (look for example vorbis_500.ogg). I can't understand, why player decodes sometimes faster with energy saving patch.
--- End quote ---
Faster PCLK means that the memory is running faster even when the CPU is running slower.
By the way, I'm assuming those builds aren't really 3.13? Probably that patch wouldn't apply to it.
404_user_not_found:
--- Quote from: saratoga on December 15, 2014, 01:41:49 PM ---By the way, I'm assuming those builds aren't really 3.13?
--- End quote ---
It's a really the old stable 3.13, not a development build. Downloaded from http://download.rockbox.org/release/3.13/rockbox-3.13.7z
--- Quote from: saratoga on December 15, 2014, 01:41:49 PM ---Probably that patch wouldn't apply to it.
--- End quote ---
Applies without any problem.
404_user_not_found:
--- Quote from: 404_user_not_found on December 13, 2014, 01:43:25 AM ---So, to be fully sure I will try a battery test.
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Finally, I completed the battery runtime test.
Sansa Clip+ with a connected headphone sony mdr-zx300. Repeat track, flac -q8, stored in internal memory, SD card not connected, default settings.
10h 36m - Untouched rockbox version 3.13 without "improve_battery_life.patch"
17h 44m - Rockbox version 3.13 with "improve_battery_life.patch" (Patch set 5)
Mihail Zenkov:
Good!
Can you check how your player work with sd card? We have report from one user clip+ - it have problem with stability only when sd card inserted. In all other report from clip+/zip user all ok (with and without sd card).
Also if you want you can try on CVDD2 setting on clip+ - just remove #ifdef SANSA_CLIPZIP before it and #endif after it. This should slightly improve battery time on hour or two.
EDIT : better use git version rockbox as 3.13 have problem - usb controller consume quite match if you disconnect player without restart.
404_user_not_found:
--- Quote from: Mihail Zenkov on December 18, 2014, 11:32:59 AM ---Good!
Can you check how your player work with sd card?
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I just performed a runtime test without SD card for a new fresh sansa clip+.
For an old player, I tried from 13 December with 64 GB SD card up to today. Works fine without any crash. May be it can help to trace a problem. I don't use a database. Most files contains a FLAC with CD Audio quality, rarely a lossy files. DSP is not turned on except volume. Volume is about -40db. SD Card formatted with MBR with huge cluster size available for FAT32.
--- Quote from: Mihail Zenkov on December 18, 2014, 11:32:59 AM ---Also if you want you can try on CVDD2 setting on clip+ - just remove #ifdef SANSA_CLIPZIP before it and #endif after it. This should slightly improve battery time on hour or two.
--- End quote ---
I will try that option.
--- Quote from: Mihail Zenkov on December 18, 2014, 11:32:59 AM ---usb controller consume quite match if you disconnect player without restart.
--- End quote ---
It's good to know. For runtime test I just for case performed a restart.
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