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Rockbox mail archiveSubject: RE: Best BatteriesRE: Best Batteries
From: Chris Holt <amiga2k_at_cox.net>
Date: Thu, 30 Oct 2003 11:55:33 -0500 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. Chris Received on 2003-10-30 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |