Rockbox Technical Forums
Support and General Use => Hardware => Topic started by: bk on July 09, 2006, 01:02:10 PM
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http://www.rockbox.org/tracker/task/5639 (Ulrich Pegelow)
Patch puts the USBOTG chip to sleep similar to the H3xx situation. Author claims 24+ hours of battery life on an X5L with this patch. I installed and will test over the next few days.
Testers and battery benchmarks needed!
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Patch puts the USBOTG chip to sleep similar to the H3xx situation. Author claims 24+ hours of battery life on an X5L with this patch. I installed and will test over the next few days.
Really cool! How does the 24+ hours compare with the original firmware's runtime?
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Thank you very much for this !
The official runtime is 35 hours so we get closer here !
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I got 5%/hour battery drop (192vbr mp3, vol ~ -25), so 25 hours is prolly a good estimate.
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I got 5%/hour battery drop (192vbr mp3, vol ~ -25), so 25 hours is prolly a good estimate.
-25 volume, damn you must have good hearing!
Currently trying this patch out also, definitely feels like an improvement; we'll see when the day is over. I usually get about 6-7 hours (w/non-patched RB) though most my files are about q5/q6 ogg, and hardly ever use the headphone-out (always the line out with my headphone-amp or if I got it plugged into the aux-port of my car radio).
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Currently trying this patch out also, definitely feels like an improvement; we'll see when the day is over. I usually get about 6-7 hours (w/non-patched RB) though most my files are about q5/q6 ogg, and hardly ever use the headphone-out (always the line out with my headphone-amp or if I got it plugged into the aux-port of my car radio).
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One thing worth to mention if we compare different file types:
On a x5l with vanilla rockbox I get 15.5 hours playtime for MP3@128k and 14.5 hours for OGG@Q6. A difference of 1 hour.
Now calculating the current draw:
current draw = capacity / play time
capacity = 2160 (96% of nominal capacity)
This makes
140mA for MP3@128k
150mA for OGG@Q6
My patch will reduce current draw by about 50mA in both cases. In terms of play time this makes
24 hours for MP3@128k, but only
21.6 hours for OGG@Q6.
So the difference is now 2.4 hours. In other words: the lower the overall power consumption, the higher the difference in play time between different codecs!
Your 6 hours with OGG@Q6 will probably turn out to be 9 hours with the patch applied.