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Electrical Systems & Diagnostics Troubleshoot electrical problems here.

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  #1  
Old 11-09-2008, 10:55 PM
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Need a little enlightenment...

...on battery tenders/charging.

I have had a couple guys tell me that the newer tenders have a pulse charging system that treats the AGM and gel mat batteries a lot better (sulfation, mainly). I have an older Battery Tender Jr. and a real old HD tender, one of the old Deltran tin-top types. I buy MoCo batteries, usually get 4-5 years out of them on the Ultra; unsure about my FXDL because I haven't had it as long.

I've looked online at several sites but don't see anything that suggests I should really swap gear for the newer batteries. Dealer here says their tender types haven't changed.

Somebody set me straight on this?
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Old 11-10-2008, 08:47 AM
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all i know is i've got two tender jr's, one old and one newer. one is hooked to my bike and the other is hooked to my lawn tractor and they both work.

when i was in fl, i had to keep one on my jeep cause i always rode the bike.
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Old 11-10-2008, 09:44 AM
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I don't use them, and have had no problems.

Replaced the battery on the 2000 phatboy, was original.
Put it in my neighbors ultra. Still working fine after this summer.

Have not had issues with the 2007 ultra. They will be hibernating
until prolly March something. Turn the key, and hit the switch.
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Old 11-10-2008, 10:36 AM
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Call Deltran and ask them if the newer ones are any different...i've heard their cust. svs. is great...

I like the Deltran Plus(3-stage)...have them on bikes, mowers, and equipment...my skidsteer battery is 10 years old...

I bought a Yuasa(5-stage) a couple years ago, and it quit workin'...
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Old 11-10-2008, 11:44 AM
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I dunnknow... but straight from the website:

SuperSmart® Battery Tender®

Many of the same features as the Global Battery Charger, but smaller and more economical. It's better than a trickle charger, because of the "smart" feature that turns itself on and off as needed, so your battery never overcharges. Accepts North American voltage (120V), supplied with 2-prong unpolarized plug. Output is 12 VDC @ 750 mA. Charger output leads are equipped with quick disconnect black connectors. Compatible with the alligator clip charging harness (included) and the optional 7.5 Amp Battery Charging Harness with ring terminals (not included).
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Old 11-10-2008, 11:54 AM
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I didn't know there was a difference either. Both mine seem to work fine.
I'll have to look into this.
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Old 11-10-2008, 12:01 PM
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I have two of the Battery Tender Plus 12V @ 1.25A


My experience with them:

One is about 15 years old, the other I bought this past summer.

The older one I used on Dyna WG for almost 10 years, (replace the battery once) then used it on my EG for 3 winters, with no problems. The older one is now used on my wife's bike, and I use the newer one on my EG.

Never had any issues with them...

BTW I found a place where I git the last one for $42 shipped.
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Old 11-10-2008, 12:05 PM
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Quote:
Originally Posted by Kfengler View Post
I have two of the Battery Tender Plus 12V @ 1.25A


My experience with them:

One is about 15 years old, the other I bought this past summer.

The older one I used on Dyna WG for almost 10 years, (replace the battery once) then used it on my EG for 3 winters, with no problems. The older one is now used on my wife's bike, and I use the newer one on my EG.

Never had any issues with them...

BTW I found a place where I git the last one for $42 shipped.
Do share
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Old 11-10-2008, 12:16 PM
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4. How is the Battery Tender Plus battery charger different from a trickle charger?

The Battery Tender Plus battery charger delivers 1.25 amperes during bulk charge mode, holds the battery charge voltage constant at 14.4 VDC during absorption charge mode until the battery charge current drops to 0.1 amperes at which time it then automatically switches to a float charge mode. During float charge mode, the output voltage of the Battery Tender Plus battery charger is 13.2 VDC, which is well below the gassing voltage of a lead acid battery. This keeps the battery topped off, while minimizing any detrimental effects to do gassing. The Battery Tender Plus battery charger is able to perform these complex switching functions because its electronic circuitry is controlled by an on board microprocessor.


Although they often appear to be a better economic choice for the typical consumer, trickle chargers do not have the advantage of sophisticated electronic control. Therefore, as they allow the value of charge current to trickle down to what appears to be safe levels, the output voltage of the charger rises well above 15 VDC, sometimes even going higher that 16 VDC depending on the charger type and the battery that is connected to it. Either voltage is well above the gassing voltage of a lead acid battery. If the battery remains connected to this high level of voltage for an extended period of time, even less than 1 day, extreme damage can be done to the battery. What appears to be a cost savings for the charger may actually cost several times the charger price in replacement batteries.
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Old 11-10-2008, 12:23 PM
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.Thanx Jimbo, that was very informative.
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Old 11-10-2008, 01:38 PM
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I actually have a Schumacher Charger/Maintainer:

Mine

Actually went to Advance Auto across the street from my house last year, and got it for $24.95.... it works great
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Old 11-10-2008, 08:34 PM
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Quote:
Originally Posted by Kfengler View Post
I have two of the Battery Tender Plus 12V @ 1.25A


My experience with them:

One is about 15 years old, the other I bought this past summer.

The older one I used on Dyna WG for almost 10 years, (replace the battery once) then used it on my EG for 3 winters, with no problems. The older one is now used on my wife's bike, and I use the newer one on my EG.

Never had any issues with them...

BTW I found a place where I git the last one for $42 shipped.
Thanks for the replys guys; my old H-D charger looks exactly like this one except with the company logo on. Still works fine and it's pretty old. I was just suspicious because some companies will reinvent the wheel with technical terms so they can sell you a new item.
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