Brand Comparison

Battery Tender Junior Reviewed

The Battery Tender Jr. is one of the best battery maintainer models. Use this review to see if the Deltran JR model is ideal for your needs.

The Battery Tender Jr. is one of the best battery maintainer models. To determine if this Deltran JR model is ideal for you, you want to read our Battery Tender Junior review. We look at the specs of the Deltran Battery Tender Jr. and compare it to other brands.

Deltran is the brand behind the super smart Battery Tender Jr. The manufacturer has been in business since 1965. Since then, it has earned a reputation for providing quality performance products that keep you protected. Because you don't want to deal with a dead battery, you need to count on the best. The BTP Microprocessor Technology offered by the company ensures your battery has the charge it needs.

Key Features of Battery Tender Junior Battery Chargers

Fully Automatic Charging

This system stops charging on its own and switches to a Maintain Mode when the battery is charged. These are more forgiving than manual chargers, further protecting your batteries.

Reverse Polarity Protected

This protection runs through an internal circuit, ensuring that the device doesn’t get damaged when the power supply polarity gets reversed. This circuit cuts off power when needed.

Battery Status Monitoring/Visual Indication of Charge State

The Battery Tender Jr. lights help you to see the state of the battery quickly. This model features LED indicators so you can determine the charge state with a quick glance. This system ensures you won’t have to wonder about your battery’s charge.

Spark Free Circuitry

The special alligator clips and ring terminals won’t spark when touched together. This model doesn’t send out any voltage until it determines that at least three volts are coming from the battery.

Quick Disconnect Harness

If you don’t want to hassle with your battery maintainer, you will appreciate the quick disconnect harness. This ensures you spend less time connecting and disconnecting the battery.

Good for Long Term Storage

The Battery Tender Junior is ideal for long-term storage use. If you plan to put your battery in storage, you want to connect it to the Deltran Battery Tender Junior, so it’s ready to go when you are.

Smart Charger Technology

4-step charging starts with Stage 1 when the battery is low. During this stage, as much power as possible is pumped into the battery, otherwise known as the high-speed charging stage. Stage 2 ensures the batteries charge slower once it becomes fuller. Stage 3 takes over when there is a 100% charge, while Stage 4 is responsible for overriding the Float Stage.

Battery Tender Junior Applications & Vehicle Types Supported

Sizes Available

Will the Battery Tender Battery charger Junior fit your application? The company offers several sizes, including the 6 volts @ 1.25 Amp, 12 volts @ 0.75 Amp, and 12 volts @ 1.25 Amps. Whether you have a motorcycle, truck, ATV, car or SUV, you should be able to match the maintainer to your needs.

Battery Types

You need a Battery Tender Jr. trickle charger that matches the type of battery you use. Whether you have a lead-acid, flooded, sealed, AGM type, gel cell or a marine battery, you should be able to hook up the maintainer to it.

Battery Tender Junior Reviewed

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The ideal way to charge a battery is with this Battery Tender Jr. 12 volt model. This Battery Tender Jr. 12v 0.75 amp charger gives your battery a full charge before it switches to float mode and maintains voltage in storage. Plus, there is plenty of protection against overcharging, and you get spark-proof technology. 

This system comes with a 12-foot output cord, so you don't even need to be too close to it for operation. This system also works on all 12-volt lead-acid, sealed, or flooded batteries for universal charging. The system is also lightweight and compact, so that you can take it anywhere with you. There's even an 80-minute safety timer.

With the four-step charging program, you get complete optimization for your battery, without the worry of overcharging. Plus, the two color LED lights show you the real-time charging state. If the battery voltage gets too low, ISM adaptive charging results in output power. Once the battery is charged, the automatic cycle switches back to the float mode.

Along with this model, you can also find the Battery Tender Plus Charger, which we reviewed separately to compare the Battery Tender JR vs. Plus. Moreover, there are plenty of Battery Tender Jr. accessories, such as this utility bag for portability.

If you’ve never used this maintainer, you will get a lot of use out of the Deltran Battery Tender Jr. instructions included with your charger. Reading through the Battery Tender Junior 12v Battery charger reviews, you see how much customers love this model. Plus, it comes complete with a five-year warranty for your protection.

Positives & Negatives of the Battery Tender Junior


  • 4-Stage charging technology
  • Works with many applications
  • 5-year warranty
  • Spark-free protection
  • Long output cord


  • Difficultly choosing the right model
  • Some dead on arrival
  • Take a few minutes to set up

Comparing Battery Tenders Junior To Similar Brands

Battery Tender Junior vs. Battery Minder

Overall, the Battery MINDer products tend to be more advanced and complicated to use. However, they offer high and low temp compensation to provide more features. With that in mind, you will pay more for the Battery MINDer chargers. It’s similar to looking at how the Battery Tender Plus and Jr models are different.

Battery Tender Junior vs. NOCO Genius G750

As with the Deltran Battery Tender Jr. vs. Plus, the NOCO Genius G750 is a more complicated and advanced option. You won't need to spend a lot more for the NOCO model, and you also get a five-year warranty. 

Battery Tender Junior vs. Black+Decker BM3B

The Black+Decker model is considered a barebones option. It's the ideal choice if you need a cheap battery maintainer, but might not be your best option for storage. When you read the Deltran Battery Tender Junior review, you see why this is a better option.

Battery Tender Junior vs. Schumacher SC1360

If you are looking for something more advanced and for permanent use, you might prefer the Schumacher SC1360. While the Battery Tender Junior high efficiency 12v charger is a great option, it simply can't compete with the higher-performing Schumacher model. 

Product Specifications


Battery Tender Junior


NOCOGenius G750


Schumacher SC1360


0.75 Amps

1.5 Amps

0.75 Amps

1.2 Amps

15 Amps


12 Volts

12 Volts

12 Volts

12 Volts

12 Volts

Vehicle Service Type

ATVs, SUVs, trucks, cars, motorcycles, etc.

ATVs, SUVs, trucks, cars, motorcycles, etc.

ATVs, SUVs, trucks, cars, motorcycles, etc.

ATVs, SUVs, trucks, cars, motorcycles, etc.

RVs, ATVs, SUVs, trucks, cars, motorcycles, etc.

Battery types Supported

lead acid, AGM, and gel batteries

lead acid, AGM, and gel batteries

lead acid, AGM, and gel batteries

lead acid, AGM, and gel batteries

lead acid, AGM, and gel batteries

Product Weight

1.8 lbs.

15.2 ounces

1.08 lbs.

1.25 lbs.

3.06 lbs.

How to Safely Use the Battery Tender Junior

If you read the Battery Tender Junior manual, you will learn how to use this machine. Here are a few tips about the Battery Tender Jr. and how to use it.

  1. 1
    Turn off the vehicle and connect the maintainer.
  2. 2
    Turn it on and watch the Battery Tender Jr. blinking red light.
  3. 3
    Wait until the Battery Tender Jr. high efficiency indicates that the battery is charged.
  4. 4
    Remove the maintainer.

You can see a video that shows how this works.

People Also Ask (FAQs)

Can I use Battery Tender Jr on a car?

According to our Deltran Battery Tender Jr. review, you can use this battery maintainer on a variety of vehicles from ATVs, motorcycles, cars, SUVs, and trucks.

Will a Battery Tender Junior charge a new battery?

You can charge most batteries with the Battery Tender Jr. Just look for the Battery Tender Jr. red light, which indicates the charging function.

How long can I leave the Battery Tender Junior battery charger connected to a battery?

Because of the 4-stage technology, you can connect the Battery Tender Jr. 6 volt of 12-volt product for as long as you want. It won’t overcharge, even when used in storage.

How does this Battery Tender compare to a trickle charger?

A trickle charger doesn't know when the battery is fully charged but continues to supply voltage. You have to continue watching these products, so no damage is done. However, the Battery Tender Junior 12v Battery charger reviews prove the 4-stage charging technology allows you to keep this maintainer attached at all times without worry of overcharging.

Do battery tenders ruin batteries?

If it automatically switches to a maintenance mode when fully charged, you won’t hurt the battery, but might actually help extend its life.

How can I keep Battery Tenders in good working condition?

Don’t use your Battery Tender in inclement weather and keep it clean. Before you use the maintainer, inspect the equipment to ensure there is no wear or damage.

Where can I get Battery Tender manuals online?

Look for the Battery Tender Jr. manual right on the company’s website if you don’t have it with the original package.

Where is the best place to buy these battery tenders online?

We always recommend buying the Battery Tender Jr. on Amazon. This platform offers a larger selection and better price than if you buy the Battery Tender Jr. on Walmart or look for the Battery Tender Jr. at Lowes.


Based on our Battery Tender Jr. review, we have shown that this model is meant to work on a variety of vehicles. You can ensure that you never come out to a dead battery again with this simple purchase.