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Battery Tender Junior
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$35.95 - $43.95
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Battery Tender Junior Charger - 6V and 12V

The Battery Tender® Junior is much more than a trickle charger. It has a brain. It's lightweight, compact, and fully automatic; very easy to use, especially in small spaces. It will keep your battery fully charged so that it is ready to go when you are!

Features:

  • Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell)
  • Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode)
  • Automatically switches to float / maintenance voltage after fully charging the battery
  • If the battery voltage drops too far under load, full charger output power resumes
  • Solid state two color LED indicates stage of charger
  • Spark-proof
  • Reverse polarity protected
  • 12' output cord
  • 5 year warranty

Note: For California & Oregon customers please see Battery Tender Junior High Efficiency model.

Resources:

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Battery Tender Junior 4.8 5 53 53
Perfect battery baby sitter I finally bought 2nd one so I can leave it on the same machine and not have to move it around from bike to bike to lawnmower. And the new one has much brighter indicator lights making it easier to see from a distance. I may get a 3rd one! July 7, 2014
If you have a bike buy this Mine has been working faithfully for years and I have never had batteries that lasted so long. I've used this on my last 3 bikes and the difference is amazing. Currently I have a well functioning battery that is 7 years old! May 21, 2014
Everyone should own one! Had this on my battery all winter, and it kept the battery perfectly charged. Bike started right up in the spring! May 12, 2014
Everyone needs one of these. Frankly I'm surprised I went so many years without one of these. I used to hook up the cheap little alligator clips for my no brand charger under my seat every night in the driveway back in the days when every bike I owned had some type of charging issue. Now I pull into the garage, hook up to a pigtail and don't worry about whether or not I'm going to be stuck with no charge in the morning. I guess that's part of being an actual adult. May 12, 2014
Use it all the time This is a great product. I use it all the time, for the price there is no reason not to have one. I use one on my bike and one on my mower. Also, with the permanent attachment to the battery it makes it easy to plug into the wall for winter storage. I have the adapter and plug my USB devices into it during the riding season. May 5, 2014
starts with confidence! After a long, cold winter my battery was a bit weak. A few days on this charger and the bike starts strong. I needed something quickly and rode over to the showroom and asked for a charger. This is what they gave me and it works May 5, 2014
Money well spent. Money well spent. I have a battery tender on evey bike I own. April 29, 2014
reliable-trouble free- enough said It works as advertised this is my second one. Inherited first one from Uncle it went kaput after several years. Replaced it with same brand as the old one was what was needed, this one so far keeps my bikes batteries up to snuff. April 22, 2014
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Have a functionality, fit, or otherwise product-specific question about the Battery Tender Junior? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Battery Tender Junior
Already Asked: 8 Questions, 34 Answers
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RevZilla Store asked: Why did you choose this?
Robert O: My second battery tender. Great product that works perfectly. Never have to worry about a dead battery in the spring after a long winter. Just use it year round and your battery will last so much longer. Jul 18, 2014
Dmitry B: Basic battery tender - does what it is supposed to do. Great price! May 8, 2014
Johnathan B: Needed a trickle charger for my FZ6R. May 3, 2014
John D: Budget maintenance! Good price on this one. Apr 19, 2014
Jim L: Winter Storage Feb 12, 2014
Shanley J: Needed a simple and easy tender. Nothing fancy. So far, this fits the bill. Jan 30, 2014
David M: Just need a basic charger.... Jan 12, 2014
Domenico S: Good reviews Jan 11, 2014
Ken V: Per technical data and price Dec 16, 2013
William C: need a simple easy to use battery maintenance device to keep my bike battery from draining over the winter Dec 11, 2013
Rhett V: The battery tender junior is a great product to use even if you ride your bike daily. It will truly increase the life of your battery by plugging it in everyday. Dec 1, 2013
Lakiri H: Had to have a tender! Nov 25, 2013
A E: Price, features, and quality reviews. Nov 10, 2013
Howie C: I have one similar that works great, so I purchased this one for my second bike. I like the reviews that it has and that it does what its designed for. Nov 8, 2013
Victor L: Just bought a new Harley and needed a reliable tender Oct 14, 2013
John R: Value and history in the business. Oct 11, 2013
Wilson L: Needed another one for another bike during winter storage. Have used BT chargers for years, always work great. 5+ yrs on MC batteries when I run these over the winter. Sep 24, 2013
NHA N: owning this at the moment! just need more units for other bikes. Very happy with it! Aug 28, 2013
A shopper asked: There is a port to connect with a charger. Does this charger have the proper lead for this mototcycle? The manual says NOT to charge the battery (unless thru the port) .That means taking off the seat,etc, etc. If it comes with the lead great, or include one if you fill this order,ok? Thanks lorin Jul 10, 2011
Answer this · Send to friends Good question? Yes (1) No (0)
mmmpies: It doesn't - you'll have to buy a powerlet adapter if you want to plug in to the port. Note that if you go this route, there's a key on/off procedure you'll have to follow or the port will shut off and the battery won't receive a charge.

Anyway, I've had six BMWs, two with CANbus electronics whose manuals included the same disclaimer you mentioned. I was wary too, but after some research I found I was able to safely use the Battery Tender with it's included harness kit to charge directly to the battery, which I did. Note that Battery Tender ships two different harness kits; one with an in-line fuse, one without (I think the BT Jr. doesn't have the in-line fuse). I recommend only using the fused model.

BMW sells an OEM branded charger you can plug directly in to the factory powerlet, but many prefer the Battery Tender and think it's a better product. I'm one of them, as are quite a few good staffers I know at BMW dealerships around the country.

If you'd like more info, you'll find a lot of chatter on this topic on sites like ADVrider and other BMW specific forums - just do a Google search.
Jul 11, 2011
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A shopper asked: Can you use a battery tender with a Shorai lithium battery?? May 13, 2014
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Joseph B: I believe so. I have a small collection of bikes, and everything that is a rider I leave on this tender, the Yuasa 1.25 model, and the Battery Tender 4 bank multi.
About 3 bikes have a Shorai in them, and i havent noticed a difference. They get switched around at times, depending on what Im riding.
Check with Shorai just to be sure, Id hate to give you bad advice, and Im not a battery expert!
Jun 17, 2014
Reply to Joseph Good answer? Yes (0) No (0)
Nicholas C: Yes, but you have to make sure to remove it from the charger once it is done charging. Lithium cells have lower self-discharge so keeping it on a "trickle charger" isn't generally necessary. See the Shorai website FAQ page for more info. May 13, 2014
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Greg L: Mine works very well with my stock 2011 BMW 1200 GS battery. Suspect that if it's 12 volt, everything should be okay May 13, 2014
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Mauro G: Yes you can it is safe May 14, 2014
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A shopper asked: I need a battery tender to use on my bike. I have a 2008 Kawi zx10r. I like this one but i'm not sure which voltage to get. I assume this would work and the voltage should be 12V but can someone please confirm for me?

Thank you
Feb 16, 2014
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Clint S: If it previously had a Deltran battery tender then this will plug right into the port underneath the passenger seat. If it was not a Deltran it's ok because this will come with a new port you can hook up to the battery and run up underneath the passenger seat, making it easy to connect and disconnect. Oh and yes 12v is the way to go, have one these for my 09 GSXR 750 and 07 R6, they work great! Feb 23, 2014
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Tyler S: This would not be a direct connection to the battery, but to the cable/port under the passenger seat. I need something that can work when connecting to that. Feb 16, 2014
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Jonathan c: Yes this will work for the zx10r. Dont hesitate this is on of the best things i did for my k6 gsxr 1000!! Feb 17, 2014
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Daniel K: Yes, you need the 12V one. I use that one for all my bikes. Works flawlessly! Feb 17, 2014
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Andre D asked: Hi all, i ll be using this product in the UK where power is 240v. Will this charger work or does it work only with 120v? Dont want to buy it and burn it as soon as i plug it :). Thanks Oct 29, 2013
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Greg L: Andre,

Absolutely 120v only! I live in Germany. I bought two Juniors and plugged them into a 120 v converter. Both blew, but fortunately the manufacturer replaced them. The converter has worked well for 3 years with all other 120 v appliances. Then I bought the waterproof 800 - works well with all voltages - that's what you want!
Greg
Oct 29, 2013
Reply to Greg Good answer? Yes (2) No (0)
LEROY B: There is a 240 volt version available. I use the charger in South Americe where the voltage is also 240v. However I have a 110v unit and I use a step down transformer.The 240v unit was not available when I purchased my charger. Dec 22, 2013
Reply to LEROY Good answer? Yes (0) No (0)
Cy S: You definitely cannot just plug it in. Zoom in on the picture, it says 120V @ 60hz. Not sure if you might have issues with a converter in the loop.

(Also, mine at home says 120VAC @ 60Hz 12W)
Oct 29, 2013
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Robert H: I am not sure. There might be a converter/adapter. I lost the manual. Apologies for not being able to give a better answer. Oct 29, 2013
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A shopper asked: Does the wiring harness have an inline fuse or is that harness a separate accessory? Feb 17, 2013
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RevZilla: Both the wiring harness and alligator clip harness have in-line fuses. Feb 19, 2013
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A shopper asked: I own both a 2009 and a 2010 kawasaki klx250s Jan 19, 2013
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RevZilla: All Kawasaki KLX250's would use the 12v Battery Tender as they use a 12v battery and electrical system. Jan 21, 2013
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A shopper asked: how long is is the battery wiring harness that comes with this? Jul 26, 2012
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RevZilla: The battery wiring harness that comes with Battery Tender Super Smart Battery Tender Jr. is about 2ft. long. Jul 30, 2012
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Product Style RevZilla SKU ID Manufacturer Product # Availability
12 Volt 177707 021-0123 In Stock: Ships within 24 hours
6 Volt 177698 021-0127 Available: Usually ships in 1-2 business days