Rockbox mail archive
Subject: Re: [JB6000] Charging Bigger Battery than before
From: Sir Pandolphe - Eudora 6 (pandolphe_at_yahoo.fr)
It's that I would like to know.
Thanks you a lot !
Thanks to Joris van den Heuvel, too.
At 17:13 04/10/2003, you wrote:
>I think I see what you are getting at. I'll answer each point, where it
>makes sens to to so.
>On Sat, 4 Oct 2003, Sir Pandolphe - IncrediMail wrote:
> > Hello,
> > Thank you for your answer.
> > I have already read all of yours FAQ.
> > Your Battery FAQ says that :
> > Does Rockbox charge the batteries more/less/worse/better than the Archos
> > firmware?
> > ------------------------------------
> > Player: Rockbox doesn't affect the charging on Players, it is all done by
> > hardware logic out of software control.
> > Ok, I Have understand this.
> > I Will try to speak step by step.
> > If you don't understand, you can say what you dont understand.
> > 1*> ) Normally, they are 1500 mah NIMH Battery on the Player.
> > 2*> ) The Archos Player 6000 charge the Original 1500 mah Battery with ONE
> > cycle of charging. I Connect to 220V my archos and i'm waiting for the
> > Battery Charged" message. Is it Ok ?
> > 3*> ) Now, I have put IN my Archos Jukebox 2300mAh NIMH Battery. Before,
> > they are 1500 mAh Battery, now 2300 mAh battery on my Archos. Is it OK ?
> > 4*> ) When I Connect to 220V my archos, it will display "Battery
> > , and after, it will display "Battery Charged". But, I Have NOW 2300 mAh
> > Battery on my player 6000 !
>Yes. Nothing is wrong.
> > 5*> ) I Think really that the archos don't charge fully (full) the 2300mAh
> > Battery with ONE cycle of charging.
>The batteries should be fully charged.
>The player charges the battery until the voltage starts to drop. That
>voltage drop means the battery is starting to get hot, even hotter than it
>gets during normal charging. The reason it starts to heat up is that the
>batteries are "full", and are not accepting any more charge.
>So, (a) Battery is full, (b) as a result, it's temperature rises, (c)
>because of that it's internal resistance rises, (d) which makes the
>voltage drop slightly, (e) which is sensed by the charging control chip in
>the player, (f) which shuts off the charging.
>Some people claim that it takes several discharge/charge cycles for NEW
>batteries to get up to full capacity. So it might be a good to just use
>them for a week or so before trying to do any timing tests to check their
> > 6*> ) Before I have plugged on my Archos The 2300 mAh Battery, I have
> > charged the 2300 mAh Battery with a specific charger.
>That is fine. I lost my wall-wart (the external transformer, 110 volt in
>my case) and always have to charge my batteries externally. I just have 2
>sets and rotate them between the charger and my player.
> > 7*> ) The archos has work during a very long time, but now, when i charge
> > with my Player 6000 (battery on my archos) the autonomy (duration of
> > playing) is more little than when i have used my 2300 mAh Battery charged
> > with a specific charger...
>Are you actually timing it? Or are you using the Battery Time Remaining
>indicator on the screen?
>Remember, you have to go to Menu -> General Settings -> System -. Battery
>Capacity and change the number from 1500 to 2300. The will make the
>display more accurate. Note that this setting does NOT affect the
>charging cycle, it ONLY affects the "time remaining" display.
>If you are using a clock to actually time how long the player plays using
>various combinations of batteries and chargers, remember that the bitrate
>and encoding method (VBR vs. CBR) of your mp3s can have a radical effect
>on the battery play time. The higher the bitrate, the more often the hard
>drive has to spin up to re-fill the memory buffer, and that results in
>shorter play times before the batteries are exhausted. So, be sure to use
>the same music each time for your comparisons.
>It may be possible that an external charger charges the batteries a little
>better or a little worse than the charging circuit built into the Player.
>Only controlled testing with your specific hardware will tell for sure.
>But I wouldn't expect more than about a 10 or 15 percent difference, if
>you are using a decent charger.
> > I Hope that you have understand me, i typped this email during 1h00 !
> > I'm sorry for busy you.
>I think I understood fine! Your English is a whole not better than my
>French. I have a year of French from High School, but I'm afraid I would
>be totally lost if I had to really rely on it...
>I hope this helps. Good luck!
Page was last modified "Jan 10 2012" The Rockbox Crew