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Battery Tender

Battery Tender Plus 12V 1.25 AMP Car & Motorcycle Battery Charger and Maintainer, Float Charge for Automotive, and ATVs - Smarter Than a Trickle Charger

Based on 21,713 reviews
Condition: New
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$58.95

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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 30
Order within 23 hours and 29 minutes

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At a glance

Condition
New
Model
021-0128
Dimensions
2.9"D x 2.15"W x 4.4"H
Weight
1.5 lb
Color
Black
Output Voltage
12 volts
Input Voltage
120 V AC
Warranty
Manufacturer Warranty
Works with
car, motorcycle, lawn mower, ATV

Features 5

  • 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.

Description

Battery Chargers, Jump Starters, Solar Chargers, EV Chargers, and Battery Maintenance Accessories Plus 12V, 1.25 AMP Junior 12V, 750mA Junior 12V, 1 AMP Lithium Plus 12V, 1.25 AMP Plus 6V/12V, 1.25 AMP Plus 2-Bank 12V, 1.25A 6V/12V, 2 AMP Lithium What makes the Battery Tender Plus different from the Battery Tender Junior model? The Battery Tender Plus delivers 1.25A vs. 750mA on the Junior for faster charging and recovery. Ideal for larger motorcycle batteries while providing the same safe float maintenance for long-term charging. Can I use this on my car battery for long-term storage? The Battery Tender Plus 1.25A is a top choice for maintaining car batteries during storage. Ideal for classic, seasonal, and weekend vehicles, it safely charges and maintains batteries with a 4-step smart system that prevents overcharging. Is the Battery Tender Plus good for a diesel truck or generator? The Battery Tender Plus 1.25A works for generator batteries and maintaining diesel truck batteries, but large diesel battery banks may charge slowly. For faster recovery, a higher-output charger like the Battery Tender 10 AMP is recommended. Can I use the Battery Tender Plus on a Porsche, Ferrari, or Lamborghini? Yes, Battery Tender Plus 1.25A is ideal for exotic and performance cars with AGM batteries, including Porsche, Ferrari, Lamborghini, and McLaren. It safely maintains infrequently driven vehicles and helps protect costly OEM batteries during storage. Is this UL listed and certified safe for home use? Yes, the Battery Tender Plus is UL listed, meaning it meets US electrical safety standards for fire, shock, and construction safety. It’s designed for safe home garage use and trusted by major retailers and vehicle owners nationwide.

Specs 21

Brand Battery Tender
Color Black
Product Dimensions 2.9"D x 2.15"W x 4.4"H
Item Weight 1.5 pounds
Output Voltage 12 volts
Input Voltage 120 V AC
Current Rating 1.25 A
Amperage 1.25

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 30

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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Top Amazon Reviews

The only thing standing between me and AAA's speed dial
A 2003 BMW and a Michigan winter is already a bad combination on paper — old electronics, old battery habits, temperatures that seem personally offended by the concept of a car starting. Add in weeks where the car just sits because who's driving anywhere in a polar vortex, and you've got a recipe for a dead battery and a bad morning. This thing quietly fixed all of that. Hooked it up, left it plugged in through the worst of it, and the car started every single time like it had no idea what season it was. No clicking, no jump-starting in a parking lot at 7am, no calling anyone for a favor. The "maintainer" part is doing the real work here — it's not just dumping a charge and walking away, it's keeping the battery at a healthy level over long stretches of sitting without overcharging it. Set it and forget it, in the actual literal sense. For less than the price of one tow, it saved me from what would've been several. Every old-car owner in a cold-weather state should just own one of these preemptively instead of learning the hard way. ... show more
Reviewed in the United States on August 29, 2026 by Will
A MUST HAVE FOR GARAGE OR SHOP!!
I PURCHASED MUTIPLE UNITS. THEY FUNCTION PERFECTLY KEEPING THE BATTERIES UP ON MY CLASSIC CARS. THEY OPERATE NEARLY SILENT. EASY TO USE & THEY WONT OVER CHARGE YOUR BATTERY. EASY TO USE , EASY TO CONNECT. I HIGHLY RECOMMEND THIS PRODUCT!!!
Reviewed in the United States on August 20, 2026 by David Hill
Great Charger That Saves You Money Over Time
Highly recommend the Battery Tender Plus 12V charger and maintainer. I currently have two of them and will probably end up buying a third—they’ve been that reliable. They do a great job of keeping batteries charged and maintaining battery health, especially for vehicles or equipment that sit for periods of time. It’s really helped extend the life of my batteries and saved me money in the long run. They’re simple to use, dependable, and just work exactly as they should. If you’re looking for a solid battery maintainer, this is a great choice. ... show more
Reviewed in the United States on June 14, 2026 by Mitch
A simple design
I have been using the Battery Tender to maintain the charge in the battery on my Ural motorcycle and sidecar. It includes an adaptor whereby you can plug it directly into the charging port on the bike. Doing this is a lot easier than having to mess about with alligator clips on the battery, which is in a difficult position. I have been using the Tender daily since December 2025 with no problems. It is a simple piece of equipment that does the required job. ... show more
Reviewed in the United States on October 20, 2026 by Westlain
It does its job, and then some!
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!) ... show more
Reviewed in the United States on January 9, 2013 by Agatha Coronado
Stood the test of time
Purchased this battery charger for my H/D and worked perfect. I now use it for my Duramax diesel truck periodically to keep the battery at full charge after too many short trips. Moved to Texas and with the heat and winter cold I use it at least 2 times monthly to top off my batteries and keeping them charged to proper voltage. This charger has been through a lot moving but always worked. Very sturdy metal case. 4 stars because it is getting old in design but so am I. 15 yrs old still working! ... show more
Reviewed in the United States on June 4, 2026 by Mark Kievit
Mixed review at 1st but went 5 stars
I was impressed with the packaging, the easy-to-understand instructions, the quality and simplicity, but then I thought it wasn't working properly and feared it would over-charge my new battery (due to some 1☆ reviews I read). My situation: we have a spare vehicle we only use once a month and then only drive short distances. After killing a 2 yr old battery, we got a new battery and our mechanic suggested a battery tender for this vehicle so I bought this. We had a new battery in the car. I hooked this up to the battery and it showed a red light for over 5 hours (meaning it's in charging mode). After the battery is at 80%, it's supposed to flash green, but after 5 hours it was still. So I unhooked it and hooked up our regular battery charger and it showed the battery was fully charged. I hooked the battery tender back up and it still showed solid red (charging) for another hour. Fearing it might fry my new battery, I disconnected. I decided to try it on my other car. I hooked up reg battery charger to other car and it was about 75% charged so I hooked up the battery tender and it showed solid red (charging) like it should and I went to bed. In the morning it was flashing green and then went to solid green indicating fully charged. So at this point, it's operating exactly as it should. So I hooked it back up to the first car. Back to solid red, but about an hour later, flashing green and then solid green now. So I'm not sure why it stayed red for so long on my new battery (that showed fully charged on my battery charger) but it seems to be working great now. Will update my review if anything changes as I plan to keep this connected full time until such time the vehicle is needed and repeat. ... show more
Reviewed in the United States on April 13, 2026 by lazylegs
Save yourself from buying new batteries every year!
Review Image by Jennifer W
Review Image by Jennifer W
I purchased this battery charger due to the many positive reviews and comments and I am NOT disappointed! I have struggled with my car since I purchased it because every spring after I take it out of storage the battery has died. I have needed to buy a new battery each spring because the battery was ruined. Being a vehicle that isn't driven often, and stored in the winter months, I decided that I needed a battery charter and maintainer to keep the battery charged when not in use for long periods of time. It is crazy how fast the battery will drain from sitting for a week or longer. This charger has been the solution to all of my problems! I have used it twice so far since I got the car out of storage because I work from home so don't drive it often. It is easy to hook up to the battery (red + clamp) and car frame (black - clamp) and the indicator lights show you exactly the state of charge of your vehicle. Red while charging, blinking green when battery is at 80% charge and then solid green when fully charged. I'm no mechanic and do not have an extensive amount of car knowledge yet even I found this to be very simple to use. I feel safe in the knowledge that I can operate this and that it will not overcharge or damage my battery. I am so thankful to all of the detailed Amazon reviews and would highly recommend this product. Of note, I did purchase the extension cable that is compatible with this item because I only have one electrical outlet in my small garage where this vehicle is stored. It will only reach the outlet if I back the car in. With the extension cable it will reach even if I pull the car in forward. I also have another vehicle in a different garage that the outlet is quite far away, so having the additional length is handy, but not necessary if your outlet is close to your car battery. Overall this purchase is WELL worth the money and I would highly recommend. ... show more
Reviewed in the United States on April 13, 2025 by Jennifer W
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