Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips
Item #: 021-0128   |    In Stock - Fast shipping from our US warehouse!

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Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips

Item #: 021-0128   |  In Stock - Fast shipping from our US warehouse!

Today's Price: $59.95


Price: $59.95


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Product Specifications for Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips

Specifications:
BM Part #: 021-0128
Brand: Battery Tender
Voltage: 12 Volt
Charging Rate: 1.25 Amp
Input Voltage: 120 VAC 60 Hz
Length: 4.87"
Width: 3.25"
Height: 2.93"
Shipping Weight: 4.30Lbs
Warranty: 10 Year
Product Manual: Download
Datasheet: Download
CEC Listed Model for CA and OR:
021-0128G-DL-WH: Battery Tender 6/12V, 1.25A CEC Listed Charger
CEC Listed 6/12V, 1.25A Battery Tender

What's in the box:

  • 12V, 1.25 AMP battery charger with LED status light to show battery status
  • Fused ring terminal accessory cable for hard to reach batteries
  • Fused alligator clip accessory cable for an alternate connection
  • 10-year warranty and lifetime customer support
Features:
  • This item is not for sale in California or Oregon (Non-CEC).
  • Temperature compensated to ensure optimum charge voltage according to ambient temperature.
  • Automatically switches from full charge to float charging mode.
  • Reverse Polarity Protection to ensure user safety. Red & Green Lights Alternately Flash in this condition.
  • Complete 4-step charging program (Initialization, Bulk Charge, Absorption Mode, Float Mode).
  • Perfect for all lead-acid, flooded or sealed maintenance free batteries (AGM and gel cell).
  • Reach: 10.5' output cords and 18" alligator clip cable or 18" ring terminal cable.

COMPLETE 4-STEP CHARGING
Smart charger technology assures the correct level of power is sent to the battery at all times.

  • 1 - Initialization determines if the battery is connected correctly and battery’s charge level, composition
  • 2 - Bulk Charge brings the charge up with full charge and constant current
  • 3 - Absorption Mode slows the charging down until the battery reaches full charge
  • 4 - Float/Maintenance Mode keeps the battery charged without overcharging or discharging

Product Description

This product is not for sale in California or Oregon. It does not meet the CEC (California Energy Commission) regulations. It has been replaced with the Battery Tender® 6/12 Volt 1.25 Amp High Efficiency Battery Charger

Introducing the cutting-edge Deltran Battery Tender Plus, the ultimate solution for maintaining the health and longevity of your batteries. Whether you're a vehicle enthusiast, a boat owner, or an avid camper, this innovative charger is designed to keep your batteries in optimal condition, ensuring reliable performance whenever you need it.

The Deltran Battery Tender Plus is equipped with advanced charging technology that automatically adjusts the charging rate to match the needs of your battery. This intelligent system eliminates the risk of overcharging or undercharging, effectively extending the life of your battery and saving you money in the long run.

With a compact and portable design, the Battery Tender Plus is convenient to use in a variety of settings. Its lightweight construction allows for easy storage and transport, making it an ideal companion for on-the-go adventures. Plus, the charger comes with a quick-connect harness that allows for hassle-free and secure attachment to your battery.

This versatile charger is compatible with a wide range of lead-acid battery types, including sealed maintenance-free, AGM, and flooded batteries. Whether you're working with a car, motorcycle, ATV, or even a lawn mower, the Battery Tender Plus is your go-to solution for maintaining optimal battery health.

Equipped with a robust set of safety features, the Deltran Battery Tender Plus provides peace of mind during the charging process. Its spark-proof design and reverse polarity protection ensure that you can charge your battery without worrying about accidental damage or hazards.

Stay ahead of battery maintenance with the Deltran Battery Tender Plus. Invest in this reliable charger and enjoy the convenience of a fully charged and ready-to-use battery whenever you need it. Don't let a dead battery slow you down—trust the Battery Tender Plus to keep your batteries in top-notch condition.

How many charging amps do I need to charge my battery?

There's no definitive answer to this question, but a good baseline is using around 10% of your battery capacity. For example, if you have a 20Ah battery, you'll be well served by a charger with a charging output of around 2 amps.

 

You can use a simple formula to determine how long it would take to charge your battery: (Battery Capacity) / (Charger Amps) = Hours to Charge. This will typically be how long it takes to bring the battery to 80% of its capacity from a full discharge. It will take an equal amount of time to bring it up that last 20% to a fully charged (100%) state.

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Frequently Bought Together:
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Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips
Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips
$59.95
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Order Today and Keep Charging!
Total for Both Items: $77.90

Cross Reference & Compatibility

The Battery Tender® Plus 021-0128: 12 Volt 1.25 Amp Battery Charger with Rings and Clips has been cross-referenced to be compatible with or replace these OEM part numbers and models:
022-0139-DL-AU
022-0139-DL-EU
022-0139-DL-UK
022-0139P-DL-WH
022-0185G-DL-WH
022-0211-DL-WH

Customer Reviews

316 Reviews | 4.9 out of 5
5 stars (278)
4 stars (34)
3 stars (3)
2 stars (0)
1 star (1)
96.5%
Would recommend this product.
What our Customers are saying
charger safe for lithium or sla batteries
October 28, 2025
by on October 28, 2025

battery mart has been a great source of my batteries, this charger is working fine.

Lyle
FL now
Would recommend to a friend?
Yes
Battery tender works great.
August 18, 2025
by on August 18, 2025

The battery tender works great. It is well designed and fits in the engine area of my very well. There are some
little lights on the battery tender to let you know if the battery tender is charging or if the car battery is fully charged.

Patty
Washington
Would recommend to a friend?
Yes
Great product
May 24, 2025
by on May 24, 2025

Super fast shipping. After frying, my battery from using an inferior product. I decided to just stop playing around.

Mark
IN
Would recommend to a friend?
Yes
Great
October 26, 2024
by on October 26, 2024

Great trickle charger

Stew
Alabama
Would recommend to a friend?
Yes
Charger
January 4, 2024
by on January 4, 2024

Just what the Dr. Ordered. Excellent!

Doug
Arizona
Would recommend to a friend?
Yes
Worked
March 23, 2023
by on March 23, 2023

After a problem happened I finally got this charger to work. The problem is in the pigtail HD motorcycle has on/or hooked to battery. I took the seat off and hooked the pigtail that come with the charger to the battery and run it out by HD's plug. Seems to work great.

Deg4u
Fayette, AL.
Would recommend to a friend?
Yes
review
March 4, 2023
by on March 4, 2023

Installation was easy, works fine so far

Andy
MA
Would recommend to a friend?
Yes