Rockbox mail archiveSubject: Re: Battery hell
From: Rob (rob.ward_at_paradise.net.nz)
I use a cell-phone charger I bought from Dick Smith (remember that ozzie?) part no. M9933 I think (www.dse.co.nz) 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 hot then it might indicate that things were going a bit crazy. My unit is as cool as a cucumber all the time. Rob, do you kiwis use 240V the same as we Aussies do ? If so, what charger are you using (Volts and mAh) ? Another question for all - do NiMh batteries take a few cycles to get to full charge ? Would it be better to charge those batteries outside the Archos ? Cheers, coutta -----Original Message----- From: Rob [mailto:email@example.com] Sent: Thursday, July 24, 2003 5:17 AM To: firstname.lastname@example.org 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? Rob 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. BUT.. 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 resultIget 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 inthemail 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 hours. I suppose I'd like to know of others experiences in this area,specifically:- how should I charge new batteries ? - is my 500mAh 9V regulated charger OK (it was OK with the original Archos batteries) Cheers, coutta
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