Battery Tender Junior 12V, 750mA Charger and Maintainer: Automatic 12V Powersports for Motorcycle, ATVs, and More - Smarter Than a Trickle Charger - 021-0123
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Extended holiday returns
FREE refund/replacement until Jan 31, 2026 Learn more
FREE refund/replacement until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: FREE refund/replacement until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
12 left in stock
Arrives
Friday, Nov 14
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: 2.9"D x 2.15"W x 4.4"H
Output Voltage: 12 Volts
Specification Met: CSA, ETL, FCC
Manufacturer: Deltran
Brand: Battery Tender
Model: Battery Tender 021-0123
Item Weight: 1.37 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:
Friday, Nov 14
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great item for motorcycles, ATVs, watercraft to keep them charged. I’ve used this brand for years and they always work great.
Reviewed in the United States on October 15, 2025 by newtriguy
I’ve been using the Battery Tender for my motorcycle, and it has been an absolute game changer. It’s super easy to hook up, and the compact design doesn’t take up any space in the garage. What I really like is that it automatically keeps the battery charged without overcharging it. Just plug it in, and it does all the work for you. My bike starts right up every time, even after sitting for weeks, thanks to this maintainer. The indicator lights make it simple to know when the battery is charging or fully maintained, which gives me peace of mind. If you ride seasonally or don’t get out on the road every day, this is the best investment you can make for your motorcycle. The Battery Tender saves time, money, and the headache of dealing with a dead battery. Highly recommend it to every rider!
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Reviewed in the United States on August 24, 2025 by Jim
I have used Battery Tender chargers for many years, mostly on motorcycle batteries, with good results: quick starts, longer battery life, less maintenance. I have two lawn tractors now (a Sears 48" conventional type mower, and a commercial grade Exmark Lazer ZTR) that live in the garage, and normally aren't run much for the three-ish months of late fall-winter in Texas. If you live in colder climates, this charger is even more critical. Hooking it up is a breeze. If you can take a nut off a bolt, you know all you need to know to install the harness. Remove the positive (red) battery cable (this is a good time to clean up the cable end and battery terminal with a small wire brush). The Battery Tender cable has a loop type butt connector on it, so just slip the red harness cable end over the battery bolt, put the positive cable and nut back on and you're halfway home. Repeat on the negative (black) cable. That's it for the harness hookup. Simple, right? Tie wrap the harness in a convenient place where you can get to the connector end, as the harness stays with the battery full time. Kudos to the manufacturer for putting a cover on the connector end to keep it clean. The original Battery Tenders didn't have that! The connector to the charger is a flat two-conductor end that can only be connected one way, so no screw ups there. Even if you manage to do it wrong (wiring the harness backwards on the battery, for instance), it won't hurt the charger, it just won't charge. Connect the harness and charger together, and plug the charger in. There is a light that reflects charging state, and also lets you know if the battery is too dead to charge this way or if the harness is wired wrong. Once it gets back to steady green, you are charged. Now it will turn on and off as needed to keep your battery at optimal levels until next use. This maintenance charge also limits buildup of sulfates in the battery, the main reason unused batteries short out. Yes, it does cost about the price of a lawn tractor battery. In my experience, it doubles the life of the battery and lasts for years so it will pay for itself. But the real value is never coming out of the house ready to go and have a dead battery stop you in your tracks... waiting hours for the charger to get it back into shape, then seeing it not hold a charge because it is sulfated. I do not miss that frustration, and this is a pittance cost-wise to avoid it. A good product from a company that has been making them for long enough to know how. They also make bigger ones for larger batteries. I have owned both types, and they work similarly. It isn't fancy, and won't wow your friends, but it does exactly what it's supposed to do. I like that in a product.
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Reviewed in the United States on December 19, 2010 by Rick Park
I couldn’t be more thrilled with this charger. It’s an absolute lifesaver for anyone who owns motorcycles, ATVs, or other vehicles that require regular battery maintenance. Setting it up is a breeze, even if you’re not particularly tech-savvy. The design is compact and lightweight, making it easy to handle, store, or even take with you on the go. One feature I really appreciate is how it automatically switches to maintenance mode when the battery is fully charged. This gives me peace of mind, knowing my batteries are protected from overcharging, which can cause damage over time. I’ve used it multiple times already, and every single time, it’s performed flawlessly. My motorcycle battery used to struggle during colder months, but with this charger, it stays in top-notch condition and starts up like a dream. I also love how dependable it is—no sudden glitches or errors to worry about. It truly does what it’s supposed to do, and it does it exceptionally well. Honestly, it’s worth every penny and has saved me a lot of headaches. If you’re looking for a trustworthy, efficient, and easy-to-use charger, this is the one! It’s the kind of product that quickly becomes a must-have in your toolkit. I wouldn’t hesitate to recommend it to anyone in need of a reliable solution for battery care.
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Reviewed in the United States on April 9, 2025 by Everyday shopper