dev builds
themes manual
device status forums
mailing lists
IRC bugs
dev guide

Rockbox mail archive

Subject: Re: Battery hell

Re: Battery hell

From: Rob <>
Date: Tue, 29 Jul 2003 13:03:47 +1200
Hi Brent. Yup, we Kiwi's use 240V (strictly 230V I think, but either are within the other's tolerance ratings).

I use a cell-phone charger I bought from Dick Smith (remember that ozzie?) part no. M9933 I think ( and is rated 9V at 0.8A max. Seems to work ok.

I read somewhere that NiMH batteries DO take a few cycles to reach full capacity. Mine new ones seem to follow this.


Coutts, Brent (DCS) wrote:
I keep a check on the temperature because I thought if my unit was getting
then it might indicate that things were going a bit crazy.  My unit is as
as a cucumber all the time.

Rob, do you kiwis use 240V the same as we Aussies do ?  If so, what charger
you using (Volts and mAh) ?

Another question for all - do NiMh batteries take a few cycles to get to
charge ?  Would it be better to charge those batteries outside the Archos ?



-----Original Message-----
From: Rob []
Sent: Thursday, July 24, 2003 5:17 AM
Subject: Re: Battery hell

Perhaps the problem is not your batteries. Are you sure they are being 
fully charged? If yes, then perhaps the problem is your hardware is 
faulty and draining them too quickly. Do we have specs somewhere that 
declare what the expected current drain is? Is anything getting hot?


Coutts, Brent (DCS) wrote:

Hi guys.

I have been Rockboxing for about 18 months, and have just recently flashed
my JBR6 (upgraded to 60GB Toshiba).  Everything is going along well.


I'm having all sorts of problems with getting batteries to hold their
charge.  I have tried 1650mAh, 1900mAh and now 2000mAh and the best result
get is 90 minutes.  Currently the batteries that are giving me the greatest
playback time are the original green batteries and I can get up to 4 hours
with them, but they are nearly 2 years old.  I use a combination of
128/160/192/224/320 mp3's and I am charging with 500mAh regulated charger
set to 9V.

The latest charging regime I am using was recommended a few weeks ago in
mail archive, which is start Rockbox, return to the folder view and let the
charging algorithm take over.  So far, I have left my 2000mAh in this mode
for 12 hours on two occasions - after the first charge I got 20 minutes
playback (!), second time I got about 90 minutes.

I also get misleading information from Rockbox about the status of the
batteries.  After the 20 minute playback, I put the charger back on and the
Info said I still had 78% left in the batteries, but Rockbox wouldn't boot
when I took the charger off (note I'm talking about the flashed version
here, it was OK with F1  using the Archos charging screen).  When using the
original Archos batteries I get 9% left, and it remains that way for 2

I suppose I'd like to know of others experiences in this area,
- how should I charge new batteries ?
- is my 500mAh 9V regulated charger OK (it was OK with the original Archos





Received on 2003-07-29

Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy