LT from desmotimes does not like the Battery Tender brand name sells another type, says they fail too often. On another note LT has his 3rd addition manual for pre orders.
Larry A Swanson
98ST2
relocated to North Port FL
-----Original Message-----
From: st2_owners@yahoogroups.com [mailto:st2_owners@yahoogroups.com] On Behalf Of bigshankhank
Sent: Friday, December 31, 2010 10:26 AM
To: st2_owners@yahoogroups.com
Subject: Re: [DucatiST] Battery Tender Junior
I am not discounting the idea that my battery "just went bad", the charger I use is Battery Tender brand charger, which I understand is highly thought of. Nevertheless after just over two years being on said tender for 25-28 days out of 30, and sometimes longer stretches, my battery is now dead. Perhaps there are other issues, the regulator burned (literally) up about three months ago necessitating a new Electrosport unit. The bike ran flawlessly after that little breakdown, but perhaps the fatal blow had been delivered and the battery was just pining at that point.
Tyler in Florida
2004 ST3
1995 900SS/CR
--- In st2_owners@yahoogroups.com, Michael Heth <mheth@...> wrote:
>
>
> On Dec 30, 2010, at 1:38 PM, Bob Graham wrote:
>
> >
> > Hmmmm. That's interesting. My experience has been just the
> > opposite; I leave my battery tender constantly connected to the
> > battery in my motorcycle and neither the Battery Tender or the
> > battery has ever failed in nearly four years of use. In fact, it's
> > the original battery that came with the bike. I may have just
> > jinxed myself here...
> >
> > Bob
> > Little Elm, Texas
> >
> >
> Say Folks,
>
> (reply is in reference to all the recent discussion about chargers).
>
> The advice about not hooking up a small charger to a battery 100% of
> the time (from my experience) was based on the "trickle charger"
> designs. They force current into the battery whether it wants to
> accept it or not, overcharging them and boiling out the aced on wet
> cell batteries. I lost a few to that problem back in the 80s when I
> used to eat a battery every year on each bike.
>
> The whole point of the "tender" concept is that once the battery has
> reached full charge the charger would switch to a "float" mode and
> only give current when the battery could accept it and in that way
> maintain the battery at an optimum charge level.
>
> So it should be obvious that if the tender type charger (nearly all
> chargers have this design now) would revert to a trickle charger type
> if the monitoring circuitry went bad or was out of spec.
>
> I'm just now getting set up with a new battery vendor and they sell
> their own branded chargers so I will double-check from their
> perspective and check with the main distributor I work with.
>
> But I do think that if you are having problems with batteries being
> short lived when they are kept on a tender type charger the charger
> should be looked at.
>
> And keep in mind that a few batteries need specific profiles to their
> charge curves (there are 3 steps to the charge curve on tender type
> chargers) and if you use a charger with a less than optimum curve you
> will not get the full life from the battery. Odyssey batteries need a
> different curve than Westco etc.
>
> The reason tender chargers are important is that modern bikes all have
> ECUs which have a parasitic drain in that they are pulling current off
> the battery when parked unlike carbed bikes which usually do not have
> a drain unless you've added something like a clock or voltmeter etc.
>
> Thanks,
>
> M./
>
> Michael Heth
> mheth@...
> (415) 992-7840
>
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