iPod Nano 2G Runtime?

[G4Oblivion]

Hiyo, I was just wondering other rockbox users average runtime on the iPod Nano 2G.
I don't care about volume level, bitrate etc. as long as all you did was play a MP3 file and not use things like rockboy and mpeg player.

Reason I am asking this is because I am only getting 6-7 hours recently playing 128/192kbits MP3s.

When I first started using rockbox in february I was getting 8-9½.
That was while I was reading a text file and playing a 128kbits song at -45dB and no power saving settings expect brightness.

Yesterday I only got 5½ hours of battery life. I was like "wtf, my battery dieing?"
So, I uninstalled rockbox and went back to iTunes to see my battery life.
I've been running my iPod 5 hours and 5 minutes and I still have over half my battery. I do not think my battery is dieing.

My current rockbox config: http://pastie.org/1278713
Its from an older build but it should still be the same settings.
I use anywhere from -40-56dB, I never go above -40 and I only use 128/192kbits MP3s.
I always let my battery fully die then fully charge it. I do not read text files anymore, I only play my music.

[Buschel]

If you go into the 2nd screen of the battery information in the debug menu, what battery current in mA do you see?

[[Saint]]

I always let my battery fully die then fully charge it. I do not read text files anymore, I only play my music.

This isn't necessary with L-ion batteries, and depending who you listen to can apparently cause harm (but I'm not so sure personally).

You can basically just charge an L-ion battery whenever is convenient, be it at 10% or 90% charge.

"Power Cycling" was only necessary for nickel based batteries, and even then wasn't strictly "necessary" but helped to keep the battery in top condition.



[St.]

[G4Oblivion]

If you go into the 2nd screen of the battery information in the debug menu, what battery current in mA do you see?

I don't have rockbox on my iPod atm. I will get rockbox again after I wake up tomorrow.

This isn't necessary with L-ion batteries, and depending who you listen to can apparently cause harm (but I'm not so sure personally).

You can basically just charge an L-ion battery whenever is convenient, be it at 10% or 90% charge.

"Power Cycling" was only necessary for nickel based batteries, and even then wasn't strictly "necessary" but helped to keep the battery in top condition.



[St.]

Apple reccomends to do it: http://support.apple.com/kb/HT1726?viewlocale=en_US
I think it would help extend battery life. I know its not needed.


Half battery and its been almost 9 hours.

[Buschel]

G4Oblivion, there was a submit by Michael Sparman which fixed an issue with USB-configuration. This bug could half the runtime on a nano 2G, if it was not connected/disconnected to USB before using it. The fix was submitted with r28261 on Oct., 12th. Are you using a version with or without the fix?
You can spot this issue when checking the battery current as described in my former post.

[soap]

This isn't necessary with L-ion batteries, and depending who you listen to can apparently cause harm (but I'm not so sure personally).

You can basically just charge an L-ion battery whenever is convenient, be it at 10% or 90% charge.

"Power Cycling" was only necessary for nickel based batteries, and even then wasn't strictly "necessary" but helped to keep the battery in top condition.

Apple reccomends to do it: http://support.apple.com/kb/HT1726?viewlocale=en_US

I believe you are incorrectly interpreting Apple:

You should charge iPod when it has fully discharged even if it won't be used right away.

They are saying not to store the iPod with a discharged battery, which is sound advice as self-discharge can then take the battery below safe voltage levels and kill it.  They are not saying to wait until full discharge to charge.

[[Saint]]

This page outlines Apples thoughts on L-ion batteries.
http://www.apple.com/batteries/


[St.]

[G4Oblivion]

G4Oblivion, there was a submit by Michael Sparman which fixed an issue with USB-configuration. This bug could half the runtime on a nano 2G, if it was not connected/disconnected to USB before using it. The fix was submitted with r28261 on Oct., 12th. Are you using a version with or without the fix?
You can spot this issue when checking the battery current as described in my former post.

I update every other day so, I don't think that was the problem.

I believe you are incorrectly interpreting Apple:

You should charge iPod when it has fully discharged even if it won't be used right away.

They are saying not to store the iPod with a discharged battery, which is sound advice as self-discharge can then take the battery below safe voltage levels and kill it.  They are not saying to wait until full discharge to charge.

My bad, it seems I misunderstood.