Rockbox mail archive
Subject: Re: Jukebox not playing very long - battery life question
From: Michael O'Quinn (michael_at_oquinn.info)
On Thu, 21 Aug 2003, Sharon wrote:
> I am gathering from this thread that I can use the charger I have now
> for my 1600 NIMH batteries to charge 2100 or 2200 ones also when I
> find them? I don't need a new charger? That would be good... (o:
Any decent NiMH charger measures the actual state of charge of the cells,
and shuts of at the (hopefully) correct time. If you are satisfied with
your current charger, all you should notice different is a slightly longer
charge time when the batteries are fully discharged.
> >On Thu, 21 Aug 2003 14:06:36 -0400, Neon John wrote:
> >> Good advice. To add to it, one of the best chargers out there right
> >> now is the Ray-O-Vac 1 hour charger available at WallyWorld, etc. It's
> >> $29.95 and, depending on the particular package, comes with either 4
> >> 1800 mah batteries or a car cigarette cord. This charger contains 4
> >> individual charging circuits so you can put 4 batteries in, regardless
> >> of the individual state-of-charge, and have them all charge properly.
> >> On 2300 mah batteries it takes about an hour and a half to charge.
> >So they have solved the overheating problem with those? Dave Etchells
> >warned against that model in his Great Battery Shootout page
> >"As alluded to earlier, one important, albeit somewhat informal finding at
> >this point: The Rayovac 1-hour charger does indeed seem to get the
> >batteries too hot. - I observed with several different sets of batteries
> >from various manufacturers that repeated charge cycles in the Rayovac
> >resulted in a noticeable and continuing decrease in maximum capacity. (Two
> >sets of cells even vented, a very unusual occurrence in my experience.)
> >It's darn fast, and charges the batteries pretty completely, but
> >definitely seems to have a negative impact on battery life."
> >Personally I use one of Rayovac's PS1 chargers. Four independant
> >circuits, slow overnight charge and 9.99 at Wal/K/mart/TArget, etc.
> >Not that I'm a cheapskate or anything. The 1850 Evereadys in my JBR right
> >now are getting replaced with some of the new 2100s, "just because". Got
> >lots of things I can use the 1850s in. :) But hey, they were less than
> >$10. Go figure. That's cheaper than the 1850s were. (~$12)
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