Rockbox mail archive
Subject: Re: Best Batteries
From: Brian (GCRockboxer13_at_columbus.rr.com)
The best batteries are found on NEWEGG and are $16 to the door.
IPOWER US NI-MH 2100mAH Battery, found at:
search for "2100 mah batteries"
should be $12 + $4 shipping.
I purchased these batteries at the beginning of November 2002 and began
having problems with them at the beginning of October 2003. I never really
saw how long they lasted without charge, but they worked for me. I used
them probably 4 to 6 hours a day, and then charged overnight, just about
----- Original Message -----
From: "Chris Holt" <amiga2k_at_cox.net>
Sent: Thursday, October 30, 2003 11:55 AM
Subject: RE: Best Batteries
> On Thu, 30 Oct 2003 11:27:07 -0500, Fred Maxwell wrote:
> > Chris Holt wrote:
> >> As long as they can handle the current demands of the Archos, they
> >> should be a good deal. I do recall reading about some issues with
> >> the 2000 Mah cells suffering reduced capacity after being used in
> >> high drain devices.
> > The Archos devices are NOT high drain. My electric RC airplanes are
> > high-drain. My SLR camera flash is high drain. Typical NiMH batteries
> > are rated for a discharge rate of up to 2C to 4C (2-4 times the current
> > rating). Thus, for a 2100mah battery, that would be a discharge rate of
> > 4200mah-8400mah. Eveready's tech graphs on their AA NiMH cells bear
> > this out though their application manual specifies a maximum discharge
> > rate for their NiMH batteries as 4C. RC Modelers often push the
> > batteries to much higher discharge rates than even 4C, with some going
> > as high as 10C. Basically, if the battery takes longer than 1 hour to
> > discharge, it's not a high-drain device.
> > There are some issues with the 2300mah cells being fast-charged. They
> > prefer a slow charge of about 1/10C to attain maximum capacity, but I
> > don't think that the charge rates provided by the AJB would present any
> > problem.
> > Regards,
> > Fred Maxwell
> Sorry, I was referring to problems caused by cells that are unable to
> provide the temporarily high current required for disk spin up. Not to
> imply that the Archos is a high drain device.
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