Battery Tender jr green back to red - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 22 (permalink) Old 08-08-2013, 12:07 PM Thread Starter
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Battery Tender jr green back to red

Hello - my battery tender has operated perfectly throughout the year, but then today I noticed it was not green anymore; it went back to red! I checked and it was very warm (I guess full charging again) so I unplugged it from the bike and the wall.

The bike started fine. But:

Did my tender go bad?

Did I do something wrong, e.g. when I go for a ride can I just detach the quick connect and jump on and ride away or am I supposed to remove the tender from the wall outlet first?

Thank you, all.

Dave
----------------
2005 Vulcan 750
Odometer @ October, 2019: 14,200
Purchased May, 2011 @ 2,172
Splines lubed @ 2,962 (were in good shape)
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post #2 of 22 (permalink) Old 08-08-2013, 12:15 PM
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Quote:
Originally Posted by DACataldo View Post
Hello - my battery tender has operated perfectly throughout the year, but then today I noticed it was not green anymore; it went back to red! I checked and it was very warm (I guess full charging again) so I unplugged it from the bike and the wall.

The bike started fine. But:

Did my tender go bad?

Did I do something wrong, e.g. when I go for a ride can I just detach the quick connect and jump on and ride away or am I supposed to remove the tender from the wall outlet first?

Thank you, all.
My Battery Tender Sr (not Jr ... LOL) blinks Red when connected to any battery.
D*** rain (during use) !
I'll open it up....probly a burnt Diode.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #3 of 22 (permalink) Old 08-08-2013, 12:21 PM Thread Starter
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I'll open it up....probly a burnt Diode.

I'll or I'd ??

Dave
----------------
2005 Vulcan 750
Odometer @ October, 2019: 14,200
Purchased May, 2011 @ 2,172
Splines lubed @ 2,962 (were in good shape)
Küryakyn Daily Tour Bag
SS-28 Slipstreamer Smoke
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post #4 of 22 (permalink) Old 08-08-2013, 12:23 PM
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I'll or I'd ??
You should do the same....open it up !

Your eyes & nose should ID the problem.


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #5 of 22 (permalink) Old 08-08-2013, 01:50 PM
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Quote:
... when I go for a ride can I just detach the quick connect and jump on and ride away or am I supposed to remove the tender from the wall outlet first?
I would always unplug from the wall regardless. Those power packs use electricity any time they are plugged into the outlet. Chargers for cell phones, cordless phones, cordless tools, etc., power packs for printers, speakers, etc., all use power whether connected to a device or not.

By leaving one plugged in 24/7, in theory you could use the device only once in a year, but still use up the life of the power pack. I unplug just to keep the electric bill down.

2003-21k mi
Shaved w/UniPK92+Stock Jets-TPE/MOSFET-Shinko Tires-AGM batt-bags-chrome-LEDs...more
__________________________________________________ ____________
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post #6 of 22 (permalink) Old 08-13-2013, 09:59 PM
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I have 6 Battery Tender Jr.s I have noticed a couple of times over the past couple of years where one would not turn green while connected to a certain battery, even if it was new. Yet when I connected it to another battery, it worked fine. I believe your issue is with the battery rather than the tender.

The Deltran Battery Tenders are protected from both being connected to a dead short or an open circuit. It's very possible that leaving one plugged in for a long tome while not connected to a battery might eventually wear it out, but I usually just unplug the bike, let the light flash red, and plug the bike back in when I get back. I've been doing this about 5 years now, ever since I got the things.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #7 of 22 (permalink) Old 08-13-2013, 10:23 PM
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You should always unplug the charger before unplugging the battery and plug the battery up before the charger. The little battery tender is constantly checking the voltage of the battery to know how much amps it needs the supply. Powered charger with a disconnected battery, the charger is confused and will eventually burn the circuit board.
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post #8 of 22 (permalink) Old 08-14-2013, 12:40 AM
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You should always unplug the charger before unplugging the battery and plug the battery up before the charger. The little battery tender is constantly checking the voltage of the battery to know how much amps it needs the supply. Powered charger with a disconnected battery, the charger is confused and will eventually burn the circuit board.
There seems to be some controversy about this issue. I just sent an inquiry to Deltran about it, Hopefully I can get a straight answer. I have 6 bikes, all connected to Battery Tender Jr.s, and the charger itself is a bit difficult to get to on some of them. If it does need to be unplugged just while riding the bikes, I will probably connect them all to a switched power source, and turn them all off when I disconnect one from a bike.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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post #9 of 22 (permalink) Old 08-14-2013, 01:47 AM
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When mine stopped working you could really smell that something was burnt out once I opened it up.

However, once I opened it up, I don't see how I could have closed it again without using a lot of super glue. Just doesn't seem to be made to be opened up and closed again. Mine was a Battery Tender Jr. too.

I didn't run it 24/7, by the way, only when my bike sat for a loooong time (a month or more), I'd plug it in until the green light came on and then I stored the tender. Still burnt out after about a year and a half after I bought it. However, it MIGHT have been because of the outlet I plugged it into. I've never trusted that outlet.

1985 VN700 unknown mileage (over 33K)

AGM Battery
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post #10 of 22 (permalink) Old 08-15-2013, 10:13 PM
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I just received this email back from Deltran as a response to my inquiry.

"The only problem with leaving the unit plugged into AC power with nothing attached would be that anything from AC power could affect the unit. As for a red flashing light, that means it is not seeing the battery and it is not putting out any kind of charge. Thank you and have a great day!

Pamela Williamson
801 International Speedway Blvd
DeLand, Fl 32724
386-736-7900
386-736-6458"

It does not make much sense to me. What does she mean by "anything from A/C power could affect the unit"? Could that not also happen with it connected to a battery?

As for the red flashing, she says that it is "not seeing the battery, and not putting out any charge" which basically means it is not doing anything if the light continues to flash red, which one of mine is doing. The battery is nearly new, and starts the bike fine. I'm going to switch that tender with one from another bike that does show green, to see if it is the tender or the bike.

I am a motorcyclist, NOT a biker.


1997 Vulcan 750, purchased about a week ago
2006 Sportster 1200 Low
2013 Royal Enfield Bullet 500, converted to carb
2001 Yamaha XT225, heavily modified
2004 Honda Rebel 250
1979 Vespa P200E
2002 Vulcan 750 parts bike
1994 Yamaha XT225 parts bike
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