Rockbox.org home
release
dev builds
extras
themes manual
wiki
device status forums
mailing lists
IRC bugs
patches
dev guide



Rockbox mail archive

Subject: Re: Battery problems
From: Curtis Stanford (curtis_at_petrobidding.com)
Date: 2002-10-25


Hey, thanks Andrew. Good info. I'll give it a try.

On October 24, 2002 10:59 pm, Andrew Jamieson wrote:
> Without any further info, it sounds like your batteries are getting old.
> As NiMh's get old, their internal impedance increases (this is a side
> effect of the so called 'memory effect'), which means that the voltage
> across the batteries themselves can drop considerably when large currents
> are drawn from them. This means that a low load battery voltage reading
> shows them to have good charge (ie when the Archos HD is powered down), but
> when the current draw increases (ie the HD spins up and draws ~0.9 A!) the
> voltage drops below the value needed to power the unit, and the unit shuts
> off, or stops playing. I get this alot on my 1.5 year old batteries. I
> would recommend trying new batteries. It may be only one of the batteries
> is stuffed, but unfortunately mixing new and old is a very bad idea for
> many very good reasons. Dont do it.
>
>
> Andrew Jamieson
>
> ----- Original Message -----
> From: "Curtis Stanford" <curtis_at_petrobidding.com>
> To: <rockbox_at_cool.haxx.se>
> Sent: Friday, October 25, 2002 2:23 PM
> Subject: Battery problems
>
> > Hello all, I've been using rockbox on my AJB6000 (yes, I know it's old)
>
> for a
>
> > while now and have noticed a problem with my battery life. On fully
>
> charged
>
> > batteries, playing a playlist, it only lasts somewhere between 45 and 60
> > minutes. The odd thing is that the battery meter shows two bars (out of
> > three) when it stops playing. I'm using the spare set of batteries that
>
> came
>
> > with my Archos and rockbox 1.4.
> >
> > Any clues on this anyone?
> >
> > Thanks
> >
> > Curtis



Page was last modified "Jan 10 2012" The Rockbox Crew
aaa