Battery Tender Plus 12V 1.25 AMP Car & Motorcycle Battery Charger and Maintainer, Float Charge for Automotive, and ATVs - Smarter Than a Trickle Charger
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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
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Features
- Adaptive Smart Charging: Our battery maintainer adapts to the needs of your 12V battery, ensuring optimal charging and extending battery life. Ideal for Automotive, Motorcycle, and Lawn Mowers.
- 4-Step Charging Program: This 12V battery charger safely charges and maintains your battery utilizing a 4-Step program to promote optimal battery health. Smarter than a trickle charger.
- Includes: 12V, 1.25 AMP battery charger, fused ring terminal and alligator clip accessory cables, 10-year manufacturer's warranty, and lifetime customer support.
- Quick Disconnect Harness: Easily connect and disconnect with our quick disconnect harness. This 12V battery charger makes maintaining your battery hassle-free, ideal for those who appreciate convenience and efficiency.
- Two-Color Charge Status: Solid state two-color LED light indicates the state of the charge and if the battery voltage drops too far under load, charging will resume full charger output power.
Brand: Battery Tender
Color: Black
Product Dimensions: 2.9"D x 2.15"W x 4.4"H
Item Weight: 1.45 Pounds
Output Voltage: 12 Volts
Manufacturer: Battery Tender
Brand: Battery Tender
Model: Battery Tender 021-0128
Item Weight: 1.45 pounds
Product Dimensions: 4.87 x 3.25 x 2.93 inches
Item model number: 021-0128
Is Discontinued By Manufacturer: No
Exterior: Painted
Manufacturer Part Number: 021-0128
Safety Rating: Não Aplicável
Amperage: 1.25 Amps
Voltage: 12 Volts
Date First Available: October 2, 2003
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
These battery charges really work fine. Once it brings your battery up to full power, it keeps it there, and never over charges it. I've uses these for many years when I rode a motorcycle, kept those batteries up to full power and never over charges them.
Reviewed in the United States on September 21, 2025 by Charles Domanski
Excellent Product •Quality •Durability •Good Value •Works As Advertised
Reviewed in the United States on October 16, 2025 by Steve
This battery maintainer has worked great for me. I have a 2008 SAAB convertible that is not a daily driver, but is always driven at least once every 7-10 days. I noted a potential power drain on the battery and have had it checked out by reputable mechanics at least 3 times and the power draw is always within "normal" tolerances. Rather than continue to buy a new battery every 12-18 months, I went with this battery maintainer and it does a great job keeping the battery charged and have had no issues. This is saving me hundreds of dollars in new battery costs.
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Reviewed in the United States on August 21, 2025 by Yorktown T
Let me tell you, folks, the Battery Tender Battery Charger and Maintainer is like having a superhero for your battery-powered gadgets! It's the Batman of battery chargers - mysterious, effective, and always there when you need it. I bought this little gem after my car battery decided to take an unexpected vacation in the middle of nowhere. I mean, who doesn't love being stranded with a dead battery, right? Well, thanks to the Battery Tender, those days are gone! It's like a personal trainer for your battery, keeping it in tip-top shape. The setup was so easy, even my cat could do it. And he's more interested in chasing shadows than reading instruction manuals. The charger is so intuitive; I'm pretty sure it winked at me when I connected it right. Let's talk about speed. If this charger were a sprinter, it would give Usain Bolt a run for his money. It charges faster than I can decide what to have for dinner, and I'm notoriously indecisive! And the maintaining feature? Oh boy, it's like having a battery babysitter. It keeps my batteries healthy and full of life, like a fountain of youth. I half expect my car to start giving me life advice every time I turn it on. In conclusion, if you want to be the envy of all your gadget-owning friends, get yourself a Battery Tender Battery Charger and Maintainer. It's the best thing since sliced bread - if sliced bread could jump-start your car and keep your gadgets alive! Highly recommend for anyone who hates being stranded or loves their gadgets more than their morning coffee!
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Reviewed in the United States on December 11, 2023 by Rich Gee Rich Gee
UPDATE -- It's now been 3+ years since I purchased this battery tender, and I couldn't be happier with it. I've continued forgetting to start up my vehicle, so I've continued needing to charge its battery. Much to my surprise--and delight--I found that the Deltran Battery Tender *WILL* indeed charge a completely dead battery! Yep, I know it will, because I've now done it several times! In each instance I simply hooked it up and left it for about 12 hours. I have no idea how much of that time it actually needed, but by the 12 hour mark my battery was charged. This is in a Toyota RAV4. I LOVE this thing! ----------- original review ----------- Because of ongoing illness, I rarely leave my house any more. Despite my best intentions to start up my vehicle every few days...or once a week...or...whatever, its battery kept dying...because I didn't start it up often enough! I finally decided there had to be a better way to deal with this than continually getting the battery charged. That's where the Battery Tender Plus comes in. I did some research to look for possible solutions, and once I learned about battery tenders, I was pretty sure I'd hit on a good one. Keep in mind that I'd never used, never even HEARD about, battery tenders before. So I plunged in a little prematurely when I ordered this one. Let me explain. I was in such a hurry to get one that I didn't bother reading all the fine details about all the different tenders I viewed. I read good reviews and saw good ratings for this particular brand, went to their web site, found the correct voltage for my vehicle, and then ordered it. It wasn't until my friend and I were installing it that I realized it wasn't really suited, logistically, for my particular situation. I park my vehicle in my driveway [because there's no room in my garage *sigh*]. Once we attached the tender we realized I'd goofed. When it's attached to the battery, the hood of the car cannot be closed all the way. It's a combination of the clips adding height to the battery AND having the power cord hanging out. You're not supposed to let the charger get wet, as in being outside in the rain, so we were kind of stumped. This model was clearly intended for a vehicle stored in a covered structure, where the hood could be left up and the charger wouldn't get wet. Before deciding to send it back, we thought we'd try doing a little rigging to make it work. I pulled my SUV all the way up to the garage door, then we stuck the charger inside the garage and let the door down gently; the power cord fit under the door without being touched, so that was fine. I have a Toyota RAV4, and its battery sits IMMEDIATELY below the windshield; its cover actually forms part of what you see as the exterior of the car, i.e., if you're looking at it from the front, the part just below the windshield wipers actually consists of the battery cover on one side. Because we couldn't get the battery cover back down into its normal, flush position, we could see that this would be a problem letting rain in. We put the hood down [almost all the way], being mindful not to crush the cord. Then we took a plastic bag, covered the area where the battery cover is, anchored the bag under a windshield wiper, stuck something on top of the bag to keep it from blowing off, and, voila!, problem(s) solved. :) If I had it to do over again, I'd definitely do a better job of researching the different styles battery tenders come in. I'm assuming there are self-contained units meant to be left installed at all times, with the hood shut, on vehicles not stored for months in a structure, only plugging/unplugging their power cord as needed. But live and learn! Note that although the instructions strongly warn against using an extension cord "unless absolutely necessary," the supplied cord is ridiculously short. Personally, I don't have a GFCI outlet right next to my vehicle, so I had no choice but to use an extension cord. The tender is working as expected. Its manual explains what its various lights signify when they're flashing or solid. If I remember correctly, the manual says that the tender will NOT charge a dead battery. So if your battery is dead, get it charged first and then hook up the tender. (See UPDATE above!)
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Reviewed in the United States on January 9, 2013 by Agatha Coronado
The charger works as advertised and is easy to use.
Reviewed in the United States on July 11, 2025 by William J. Engle
Can't go wrong with this battery tender. I have four and they last forever. Keeps your batteries charged for your next adventure.
Reviewed in the United States on October 18, 2025 by Jas
Works well to keep auto battery charged when vehicle sits dormant
Reviewed in the United States on October 15, 2025 by Amazon Customer