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Battery Tender

Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports Battery Charger for Motorcycle, ATVs, and More - 021-0123

    • Based on 45,873 reviews
Condition: New
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Eligible for Return, Refund or Replacement within 30 days of receipt

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, May 11
Order within 5 hours and 56 minutes
Available payment plans shown during checkout

Features

  • STAY CHARGED: Battery Tender battery chargers and maintainers provide a full charge to your powersport vehicles battery before switching to float mode to maintain proper voltage levels for safe, long-term storage
  • EXTEND BATTERY LIFE: Compatible with all 12V lead-acid, flooded, AGM, and gel cell batteries. Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode) allows for optimization of battery power, without overcharging or battery damage. Smarter than a trickle charger.
  • INCLUDES: 12V, 750mA battery charger and battery maintainer with 12-foot output cord, fused-ring terminal harness for hard-to-reach batteries and alligator clip accessory cables, 5-year warranty, and lifetime customer support
  • SIMPLE & SAFE: Low maintenance, easy-to-use, universal battery charger is just 3.3 x 1.3 x 2.4 inches, 1 lb (charger only). Spark-proof circuitry ensures no-spark connections, and automatic reversed hook-up detection verifies correct connection
  • MONITOR POWER LEVELS: Two-color charge status LED light indicates the state of the charge and if the battery voltage drops too far under load, adaptive charging will resume full charger output power. Automatic charge cycle functionality switches to float mode after fully charging the battery

Brand: Battery Tender


Color: Black/Green


Product Dimensions: 1.3"D x 2.4"W x 3.3"H


Output Voltage: 12 Volts


Input Voltage: 12 Volts


Manufacturer: ‎Battery Tender


Brand: ‎Battery Tender


Model: ‎Battery Tender 021-0123


Item Weight: ‎1.41 pounds


Product Dimensions: ‎8 x 4 x 9 inches


Item model number: ‎021-0123


Is Discontinued By Manufacturer: ‎No


Exterior: ‎Painted


Manufacturer Part Number: ‎021-0123-CA


OEM Part Number: ‎cc2851011


Safety Rating: ‎Não Aplicável


Amperage: ‎0.75 Amps


Voltage: ‎12 Volts


Date First Available: November 30, 2004


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, May 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • I love this charger!
I bought the larger full size version of this first from Costco and it never worked for what I wanted it to. It didn't charge dead batteries, and the interface made it confusing to charge different batteries. I got this one to replace it, and man, it works SO much better AND easier, even though it's smaller and called the junior. Simply plug and play, and the charger charges any battery and maintains it nicely. I have 5 vehicles so I bought two of these with a bunch of quick connect pig tails and now all my vehicles are easily maintained and charged up when needed. I accidentally left my car on ACC for like a day and a half and it was drained... plugged up the charger and two days later it was perfectly charged and good to go again. Would recommend!! ... show more
Reviewed in the United States on April 24, 2024 by lowke_reviews
    • Works great indoors in attached garage
I'm a greenhorn at car-care, but this product was pretty much foolproof! I'm using it to keep the battery topped off for my family member's car, as she has just had surgery and won't be driving for 2 months. I do not need it for months and months of storage and maintenance, so the 2018-era reviews complaining about "now it only lasts for one year" after the manufacturer's move to China, really don't matter to me! I really appreciate the built-in safety feature of no sparking if you touch the clips together. Current won't flow through this product, even when connected to the outlet, until it senses 3 volts. This could make it hard to charge a TOTALLY dead battery with this product, but it worked perfectly for us. To put this thing together, you'll have to pick either small-ring connectors - which are for the non-car uses that will sit for over 6 months, like an ATV or motorcycle or boat - or the alligator clips, which are for cars and bigger engines that will be connected for just a few months. You'll also have to have color vision to discern between red and black, since the alligator clips confusingly have a (+) symbol on one side of their jaws. On the second jaw, they differ (+) and (-), so if you can't tell them apart at first glance The most difficult part for me was step 6e/f in the instruction manual - determine if your car engine has negative-ground or positive-ground status. Like I said, I'm a greenhorn here. Sure, the manual says "most cars" are negative-grounded, but I didn't want to mess it up, cuz car batteries are big hefty things you don't play around with. After real careful inspection, I found that the battery of our car had a wire going directly onto and behind the hefty metal of the vehicle body or "chassis" I learned it is called, which came from the (-) side of the battery. The (+) side had a complicated plastic cover over it, which made connecting the alligator clip a bit difficult, and that side's wire led to other engine parts. That's what made me 90% sure that the negative side was the "grounded" side. So I connected the (-) black clip to the (-) side of the battery, and the red clip to a nut-and-bolt part of the engine. I was able to close the hood on the car most of the way by turning the clips sideways and flat as I could. It's not latched at the moment, but sitting in our garage, it should be plenty protected from spiderwebs and dust and whatnot. No option in our case to thread the cable thru the front grille since it's pretty jam-packed with engine parts right behind it. My one complaint about this product is that the cable ending in the two alligator clips splits pretty close to the jaws end, and it would help to have it split further up, to help users reach a part of their engine block or chassis more easily. Also, I highly recommend addition of diagrams. There are words saying "connect wire to engine block or vehicle chassis, not sheet metal or fluid lines" but some of us need an illustration of what is a sheet-metal body part vs the vehicle chassis! Once connected to the engine, I turned my back on it just in case, to plug in the "wall wart" (credit to Mythbuster Adam Savage for that term) and the light turned steady red! This was encouraging, since when I had tested it earlier by plugging it into the wall with no connections made, it blinked red. So I was confident I did not have a defective wall wart box. 6 hours later, the light had turned blinking green, and 6 hours after that, it had turned steady green, which the manual says is the perfect state to leave it in for 'drip feed' of electricity to keep the battery operable while not in use. So I am perfectly satisfied! Our car's battery was diagnosed by a mechanic as "being on its last legs" anyway, so this comparatively cheap product, for 2 months of use only, is perfect for our needs. I'd recommend anyone with a really expensive car or battery that needs storage for 6 months or more do a bit more research and spend a bit more on it. ... show more
Reviewed in the United States on October 27, 2022 by MeepBeep
    • So far so good
I got fast shipping and so far, it charged up my battery. It looks like a well-made product, really nice packaging with easy-to-understand instructions. My battery wasn't completely dead, and it took about 14 hours to charge it up. I seldom use my truck so this trickle charger will keep the battery charged. ... show more
Reviewed in the United States on May 5, 2024 by DPS
    • Best Battery Tender
This one is a newer model but has same model numbers as the other one I have had for 9 years and has never let me down. Batteries in my Harley’s and jet skis now last four years instead of one or two. I needed another one so I don’t have to switch them so often. Long lasting and great product.
Reviewed in the United States on April 29, 2024 by doler otrey
    • Thought it came complete
I bought this to maintain the battery on my mower, however when I opened the box, it did not come complete with a permanent connection plug to leave on the battery, to leave on the battery so I could just plug into it when I finished mowing, it only had the jumper cable style hookups. I have used these in the past and they always came with both connections. Now I will have to purchase an additional cord to make this like I want it. ... show more
Reviewed in the United States on April 24, 2024 by 2tyres
    • Lifesaver for the long winters
I place this on my motorcycles all winter. I do a rotration on the 3 bikes and it keeps all the batteries topped off. I used to unhook the batteries but it was always a pain. I think I am going to buy 2 more so I dont have to rotate anymore.
Reviewed in the United States on May 1, 2024 by Christopher Bryant
    • Everyone needs one of these for their motorcycle!
Purchasing one of these alleviated with some initial battery issues I was having after first purchasing my motorcycle (it had a bad battery in it from previous owner). Even after fixing that, when I have had to use the trickle charge it has been great.
Reviewed in the United States on May 1, 2024 by Allison Whitton
    • Quality & Cord Length
Purchased 2 of these to replace the two I had that worked and lasted 8 years until a lightning strike hit the electrical transformer. Like the new ones as well. Cord is a few inches over 10ft with additional 2ft removable cord with alligator clips that can be unattached from main cord.
Reviewed in the United States on April 26, 2024 by Kevin Blake

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