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iriver H320 + 32GB CF-Card + 2200mAh Battery - some problems
polluxx2006:
im usinsg a koss porta pro.
littlenick:
O.K. - What I report now happens on a iriver h120, with rockbox 3.5.1
Also changed the battery (maybe 6 months ago), put in a 2200 mAh. This one had been sitting in new condition for two or three years on the shelf at home before I put it into the player (does shelf-life of a new battery affect life-cycles afterwards - if so, strongly?).
After charging maybe 4 to 5 times the maximum voltage doesn't go anymore up to 4.19 V but merely to 4.04 or so (progressively decreasing).
Now I made a test:
I should get with this battery capacitiy well over 15 hours of playback with original firmware, but after approximately 11 hours automatic shutdown occurs. Restarting after OF shutdown with rockbox shows a current voltage of ca. 3.6 V - but now look at this:
I got another 4 hours of playback with rockbox until final automatic shutdown occured due to low battery! Restarting right after that with rockbox displays a battery voltage of 3.04 Volts! (And the repeated clicking sound on shutdown suggests the hdd got some difficulties to reach the parking position).
Well - how does that power drain affect lifetime of my battery?
soap:
littlenick, are you pollux or are you hijacking his thread? I only ask because it is a strong coincidence that the two ip addresses are so geographically close for similar issues on an uncommon player.
--- Quote from: littlenick on September 20, 2010, 03:35:22 PM ---O.K. - What I report now happens on a iriver h120, with rockbox 3.5.1
Also changed the battery (maybe 6 months ago), put in a 2200 mAh. This one had been sitting in new condition for two or three years on the shelf at home before I put it into the player (does shelf-life of a new battery affect life-cycles afterwards - if so, strongly?).
--- End quote ---
Yes, lithium chemistry batteries lose capacity, even when in unused storage. The amount of capacity they lose is related to their storage voltage. If it self-discharged sufficiently low it could die on the shelf within a few years.
--- Quote from: littlenick on September 20, 2010, 03:35:22 PM ---After charging maybe 4 to 5 times the maximum voltage doesn't go anymore up to 4.19 V but merely to 4.04 or so (progressively decreasing).
--- End quote ---
This is a very bad sign pointing to a dying battery.
--- Quote from: littlenick on September 20, 2010, 03:35:22 PM ---Now I made a test:
I should get with this battery capacity well over 15 hours of playback with original firmware, but after approximately 11 hours automatic shutdown occurs. Restarting after OF shutdown with rockbox shows a current voltage of ca. 3.6 V - but now look at this:
I got another 4 hours of playback with rockbox until final automatic shutdown occurred due to low battery!
--- End quote ---
All this implies is that Rockbox has a lower threshold voltage.
--- Quote from: littlenick on September 20, 2010, 03:35:22 PM ---Restarting right after that with rockbox displays a battery voltage of 3.04 Volts! (And the repeated clicking sound on shutdown suggests the hdd got some difficulties to reach the parking position).
Well - how does that power drain affect lifetime of my battery?
--- End quote ---
Not sure the exact question - but bypassing the low-battery-shutdown-protection routine by repeatedly rebooting is a great way to over-discharge a lithium chemistry battery.
littlenick:
First: I'm not pollux nor was it my intention to hijack his thread - my observations might have to do with pollux's problems - so why start a separate thread?
Second: @pollux - Since we seem to own so outrageously uncommon players and seem to live so near (and I intend to do the CF mod someday), would you be interested to drop me a private note - so we could work on some issues together?
Third: @ soap
Quote from: soap on September 20, 2010, 06:38:22 PM
"Not sure the exact question - but bypassing the low-battery-shutdown-protection routine by repeatedly rebooting is a great way to over-discharge a lithium chemistry battery."
I wanted to see what the threshold value for rockbox's shutdown was and couldn't think of any other way but starting rockbox.
The result suggests that the threshold value of rockbox isn't very battery-safe (a possible relation to my fast deteriorating battery) and that it is safer to operate with original firmware.
soap:
--- Quote from: littlenick on September 23, 2010, 02:57:03 PM ---The result suggests that the threshold value of rockbox isn't very battery-safe (a possible relation to my fast deteriorating battery) and that it is safer to operate with original firmware.
--- End quote ---
I don't see how you draw that conclusion. Also, the battery voltage you saw on your third boot is likely false, as the (relatively) high draw of the HDD during boot temporarely pulled the voltage low.
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