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  • Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger
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Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger

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List Price: $39.95
Price: $25.89 & FREE Shipping on orders over $35. Details
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Ships from and sold by Amazon.com.
  • Spark proof during lead connection, reverse polarity protected and includes a 12-foot output cord and 5-year warranty
  • Perfect for charging all 12-volt lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell)
  • Complete 4-step charging program (Initialization, Bulk Charge, Float Mode) allows for optimization of battery power, without overcharging
  • Automatic charge cycle functionality switches to float mode after fully charging the battery
  • Solid state two color LED indicates stage of charger. Not for sale in California
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144 new from $18.73

Automotive Winter Driving Essentials
$25.89 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com.

Frequently Bought Together

Battery Tender 021-0123 Battery Tender Junior 12V Battery Charger + Battery Tender 081-0069-6 Ring Terminal Harness with Black Fused 2-Pin Quick Disconnect Plug + Battery Tender 081-0148-25 25' Quick Disconnect Extension Cable
Price for all three: $44.23

Buy the selected items together




Product Information

Technical Details
BrandBattery Tender
Model0210123
Item Weight1.8 pounds
Product Dimensions8 x 4 x 9 inches
Item model number021-0123
Manufacturer Part Number210123
OEM Part Number 021-0123
ABPA Partslink Number 13
  
Technical Specification
  • Product Warranty: For warranty information about this product, please Click here [PDF]
Additional Information
ASINB000CITK8S
Best Sellers Rank #4 in Automotive (See top 100)
Shipping Weight1.5 pounds (View shipping rates and policies)
ShippingThis item is available for shipping in the U.S. except for California and to select countries outside the U.S.
Date First AvailableOctober 2, 2000
  
Warranty & Support
Warranty, Parts: Parts
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Product Description

Product Description

Battery Tender Junior 12V Battery Charger is much more than a trickle charger. It has a brain, is lightweight, compact, fully automatic and very easy to use especially in small spaces. This battery charger will keep the battery fully charged so that it is ready to go always. It has a microprocessor controlled fully automatic charger and maintainer and is designed to extend the life of any lead acid battery commonly used in automobiles, motorcycles, ATVs, personal watercraft, RVs, boats, airplanes, golf carts, back-up generator systems, etc. Any vehicle or battery-operated piece of equipment not used on a daily or regular basis is a candidate for a Battery Tender charger. The advanced technology will bring the battery back to a full charge without overcharging and then float or maintain the battery for an indefinite period of time. The Battery Tender Junior comes equipped with alligator clips and ring terminals for easy hook up. An optional 25 feet extension cord (part number 081-0148-25) is sold separately.

Amazon.com

The Battery Tender Junior 12-volt/.75-amp battery charger is the small and simple solution to the challenge of keeping vehicle batteries optimally powered when not in use. It is able to charge any lead-acid battery, including standard and sealed AGM and GEL Cell battery types and is also designed to be easy to use in small spaces, to utilize a 4-step charging program and safely function in a fully automatic mode. Taken together this makes the Battery Tender Junior 12-volt charger an excellent means of ensuring that your battery is fully charged and ready to go when you are.

The Deltran Battery Tender Junior 12V Battery Charger with alligator clips, ring terminal, output cord
4-step charging with automatic float mode.
View larger.
The Deltran Battery Tender Junior 12V Battery Charger in retail packaging
Charge any lead acid battery, including AGM and gel cell.
View larger.
Safe, 4-step Battery Charging
The Battery Tender Junior 12-volt charger is much more than a trickle charger. It has a "brain". Utilizing a 4-step charging program (initialization, bulk charge, absorption mode and float mode), it allows you to simply connect the charger to a battery, either in or out of a vehicle, and forget about it until you are ready to put the battery to work. Like all Battery Tender chargers, at the end of the regular charger cycle it automatically switches its output voltage to a safe, storage or float level that eliminates the need to worry about the damaging effects of overcharging, and the resulting need to check on the condition of the battery. If/when the battery voltage drops too far under load, output power resumes and the charging cycle begins again. The unit also features sparkproof connectors, short circuit and reverse polarity protection, an easy to understand charging status indicator consisting of a single LED, and almost no current draw from batteries connected to it.

Key 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 and 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 and reverse polarity protected.
  • 12' output cord.
  • 5 year warranty.
Charger Models
Output Voltage
Output Current
Charging Software*/
Battery Type
AC Voltage/
Frequency Input
(Volts)
(Amps)
Battery Tender Junior 6V Battery Charger 6V 0.750A 3 Step STD & AGM 120 VAC, 60 Hz
Battery Tender Junior 12V Battery Charger 12V 0.750A 4 Step STD & AGM 120 VAC, 60 Hz
Waterproof 800 12V Battery Charger 12V 0.800A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz
Battery Tender Plus 6V Battery Charger 6V 1.25A 4 Step STD & AGM 120 VAC, 60 Hz
Battery Tender Plus 12V Battery Charger 12V 1.25A 4 Step STD & AGM 120 VAC, 60 Hz
Battery Tender Plus 12V Battery Charger (Gel Cell) 12V 1.25A 4 Step STD & AGM or GEL 120 VAC, 60 Hz
Battery Tender Twin 800 12V Dual Battery Charger 12V 0.800A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz
Battery Tender 12V 2-Bank Battery Management System 12V 1.25A 3 Step STD & AGM 100 to 240 VAC, 50/60 Hz
Battery Tender 12V 4-Bank Battery Management System 12V 1.25A 4 Step STD & AGM 100 to 240 VAC, 50/60 Hz
Battery Tender 12V 5-Bank Battery Management System 12V 2.0A  4 Step STD & AGM 120 VAC, 60 Hz
Battery Tender 12V 10-Bank Battery Management System 12V 2.0A  4 Step STD & AGM 120 VAC, 60 Hz
*Note: All Deltran battery chargers will charge all types of lead acid batteries: either flooded (standard STD), sealed maintenance free Absorbed Glass Mat (AGM), or sealed maintenance free gelled electrolyte (GEL) batteries. However, for optimum battery performance in deep cycle applications (for example, running a trolling motor), it is best to chose the Deltran charger that has the charging software specifically designed for the battery type. Fortunately, since the technical staff at Deltran has developed charging software that works equally well for both STD & AGM batteries, the only choice to be made is between 2 models: either STD & AGM or GEL software.

Five-year Limited Warranty
Deltran provides a limited five-year warranty on its Battery Tender Junior 12V Battery Charger to the original purchaser based on defective material or workmanship. Warranty is void in cases of product misuse, disassembly or modification. Other details regarding warranty limitations and procedures are contained in the Deltran Battery Tender Charger's general limited warranty information sheet enclosed with this product.


Customer Reviews

Very very easy to installI would recommend this to anybody.
Pen Name
Battery Tender jr is great for my motorcycle to you use during storage in the winter.
S. Bock
They work great to keep the small battery fully charged at all time and ready to go.
T. Pham

Most Helpful Customer Reviews

678 of 696 people found the following review helpful By Shawn Murphy on September 21, 2009
Verified Purchase
In the analysis of buying a Tender Jr. vs. a Tender Plus, the main issues are time to full charge, battery size, & parasitic draw. The Tender Plus (1.25) will get the job done twice as fast as the Tender Jr. (0.75). Both now are similar architecturally, save it be the charging power & lack of temperature compensation on the Jr. They both are 4 stage, both have the same sophisticated computer chip technology running the charging process, etc... I spoke to The Deltran(The Manufacturer) customer service department on 3 different occasions, making sure I had the facts right. The first 2 times I was misinformed about the temperature compensation issue. I am editing this review to be accurate as of today's date of 12/01/10. Because The Plus will bring a battery to full charge twice as quickly as The Jr. will, The Plus has a much better chance at overcoming a parasitic draw on your batteries power. Modern cars have sophisticated electronics that require constant power 24/7. Check all your battery connections & your alternator belt!!! If the connections are not clean & tight, clean it with original coca-cola and a rag / brush, make sure they fit snugly. If your alternator belt is too loose it will not charge your battery properly. If you only want to buy one Tender, don't cheap out, buy The Plus if you have the money to do so. If you want to buy 2 or 3 Tenders to make sure all your batteries are fully charged, the Jr. will probably do just fine. I personally alternate The Jr. between 3 different cars, if I had it to do over again, I would buy The Plus instead as I am not a patient person. Both models will turn off in 72 hours automatically if a full charge is not reached, & neither will start charging without at least 3 volts stored in the battery before initiating a charge.Read more ›
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397 of 442 people found the following review helpful By Stuart S. on October 19, 2011
Verified Purchase
I bought my first Battery Tender Jr. about 20 years ago (for an antique car that I drove infrequently) and it worked fine for over 15 years. I included it with that antique car when I sold it, and as far as I know, it still works.

Based on my prior experience, on November 4, 2010, I bought another Battery Tender Jr. from Amazon for another infrequently driven car. It is now less than 1 year later, and that Battery Tender Jr. got so hot that the plastic case buckled and separated at the seam. So, planning to return it under warranty, I read their terms. Not only do I have to pay to ship that defective unit back to Deltran (which I expected), they also charge a fee for "Warranty Evaluation, Shipping & Handling"! That is OUTRAGEOUS! Since I have my receipt, my fee would be only $7.95 (if no receipt, fee is $11.95). It would cost me $18.90 ($7.95 plus $10.95 USPS Flat Rate medium box) to return it (or $22.90 if I didn't have a receipt - which is more than the $21.39 cost of a new one from Amazon delivered!) Why bother with a warranty claim? If that was Deltran's plan from the outset - to discourage warranty claims - their so-called "warranty" is a fraudulent misrepresentation.

No doubt that my first, 20-year old Battery Tender Jr. was made in the USA. Not so with the second one - the label says "Made in China". A piece of Junk!
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69 of 77 people found the following review helpful By Sanford12 on November 3, 2006
Verified Purchase
This is an easy to install and use battery tender. If you store your motorcycle during the winter you should use one of these to extend the life of your battery.
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123 of 142 people found the following review helpful By A. Flores on March 9, 2006
Verified Purchase
The battery Tender Jr. comes with 1 set of permanent mount ring terminals & 1 set of mini jumper cable clamps so you can hardwire 1 car & use the clamps whereever they are needed.The 1-way quick disconnect on the cord makes things very easy to hook up & unhook. And it is maintaining my battery fine, no more dead car.
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32 of 35 people found the following review helpful By DBC on December 1, 2011
I bought one of these and while it seemed to work fine for several months, it didn't last a year before it died. Not sure what happened but it wouldn't charge. I have had good luck with the Yuasa brand chargers and prefer them now exclusively.
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32 of 38 people found the following review helpful By Shelakio on April 18, 2012
Verified Purchase
Bought this item back in 2010 and it worked fine until a couple of week ago. The green light just flashes quickly and doesn't charge. To send the charger back to Deltran and paying for the warranty cost just as much as a new one. I would suggest getting the Battery Tender plus or other maintainers.
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61 of 76 people found the following review helpful By lwalker on May 7, 2012
Verified Purchase
Ordered this product and received it quickly. Unfortunately it did not work correctly. After speaking with the company and trying their suggestions to fix it they finally agreed to allow me to return it for a replacement. They didn't want to pay the return shipping but finally agreed to that as well. I don't like it when I am forced to negotiate to get what should be normal in a defective product situation. After receiving the new charger it worked or at least seemed to work okay. After a couple weeks I checked on it and it was doing the exact same thing as the original charger. It made me wonder if they sent the same one back to me. I must confess I was tired of dealing with it so I just chocked it up to a loss. I did not want to get into another negotiation with return shipping and trouble shooting. I guess they won the round but lost a customer. I will not buy from them again.
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24 of 28 people found the following review helpful By Michael O on September 1, 2007
This turned out to be a great package. Includes not only a high quality unit to maintain the battery, it also comes with a quick connector with a protective cap to attach permanently connected to the battery that will add value and ease of servicing.
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