Reviewerst Chargers Best Diesel Truck Battery Chargers

Diesel truck batteries lose their power due to numerous reasons. Whether the batteries get out of order because their lifespan ran to an end or as a result of your inattention, the exhausted or dead batteries can bring a lot of inconveniences. That is why you decided to set out to detect the best battery chargers for a diesel truck to be well-prepared for discharged-battery situations.

Because diesel trucks have two batteries to successfully start the engine, you will want to find the charger that would allow dual battery charging and provide enough power to get dead batteries back to life. But it sounds easier than it is. Even though the battery charger market is flooded with options, getting a reliable and powerful battery charger for a diesel truck can be a nerve-wracking quest.

This review will become a true chill pill for you. You will get your questions about the diesel battery charger answered and will be equipped with the list of the most attractive products available on the market these days.

Our pick
Best AGM Battery Charger
NOCO GENIUS2X4
Best AGM Battery Charger
One of our NOCO most powerful, highest-performing, energy-efficient, and compact charger yet.
Name Voltage Charging current Battery capacity Weight Review
NOCO GENIUS2X4best overall 6 V / 12 V 8 A 160 Ah 3.9 lbs / 1.8 kg Review
Schumacher DSR124most powerful 6 V / 12 V / 24 V 15A Not applicable 70 lbs / 31.8 kg Review
NOCO GENIUS 10 budget 6V / 12V 10 A 230 Ah 3.33 lbs / 1.5 kg Review

Best diesel truck battery charger reviews

NOCO GENIUS2X4 – best overall

NOCO GENIUS2X4

The multi-bank NOCO GENIUS2X4 battery charger, maintainer, and desulfator will help you take care of four batteries at the same time covering a wide range of your needs.

Being designed for 6V and 12V lead-acid and deep-cycle batteries like flooded, gel, AGM, and lithium-ion batteries, this maintainer delivers high performance due to 8 – 2 Amps per bank with a 40 Ah capacity range. The output power is measured at 120 W to recover the discharged truck batteries easily.

Similar to Schumacher DSR124, this NOCO product offers enough energy to manually start the dead battery. However, this device is more compact and won’t occupy much space in your trunk or garage.

The NOCO battery charger comes with four interchangeable connectors, four clamps, four 10” extension cords, two self-tapping screws, type A, C, G, and I power cables, and the manual.

NOCO GENIUS 2X4 Picture

Thanks to microprocessors and smart programs, this charger controls the charging process to eliminate overcharging and assesses the battery condition. The indicators will help you keep an eye on the progress and state of the batteries. The eyelets on the clamps are removable, but mind that they might not fit some batteries. Thus, you might be forced to buy the replacement, which will cost you around $50.

Being a multifunctional and powerful unit, the NOCO GENIUS 5 is the best AGM battery charger that offers the utmost functionality and flawless performance.

Key specs

  • Voltage, V : 6/12
  • Charging current, A : 8
  • Battery capacity, Ah : 160
  • Output power, W : 120
  • Weight, lbs/kg : 3.9 / 1.8
  • Dimensions, inch/cm : 2.3 x 9.4 x 5.7 / 5.8 x 23.9 x 14.5

Pros

  • Supports both 6V and 12V batteries for wider use
  • Delivers 8 Amps of charging current
  • Prevents overcharging and helps control the battery condition
  • 120W output power is just right to charge four batteries.

Cons

  • The clamp eyelets don’t always fit the battery.

Schumacher DSR124 – most powerful

Schumacher DSR124

The Schumacher DSR124 is a professional-grade battery charger and engine starter from the ProSeries, specially designed for heavy-duty use.

Unlike the SC1400 model of the same brand with two voltage compatibility options – 6V and 12V, this Schumacher DSR124 supports 6V, 12V, and 24V batteries. This device produces up to 80 Amps for 330 Ah batteries to be able to jump and crank nearly any diesel truck. It is suitable for standard, AGM, gel, and deep-cycle batteries.

Along with the charger, you will also find a memory-saver cable, cable clamp cleats, screws, and manual in the box. The clamps are heavy-duty, and the charger construction is made from sturdy steel. Thus, the unit can be used both indoors and outdoors.

Schumacher DSR124 Picture

Schumacher DSR124 boasts multi-stage charging for enhanced precision and battery life. There is also an easy-to-read digital display with numerous notifications. Automatic microprocessor control and reverse hook-up protection ensure the optimal charging experience, while the memory saver mode will significantly simplify the charger use experience. But let me warn you that there probably were some quality control issues at the factory and numerous battery chargers were dead out of the box. Luckily, due to the 1-year warranty, you can easily replace the broken one.

Whether you need to charge or jump-start a diesel battery, this heavy-duty diesel truck battery charger is powerful enough to handle these tasks.

Key specs

  • Voltage, V : 6/12/24
  • Charging current, A : 15
  • Weight, lbs/kg : 70 / 31.8
  • Dimensions, inch/cm : ‎34 x 20.5 x 16.5 / 86 x 52 x 42

Pros

  • 6V, 12V, and 24V capability for various battery types
  • Delivers up to 80 amps of power to 330Ah batteries
  • Memory-save mode for ease of use
  • Informative display for enhanced maintenance.

Cons

  • Some items were defective out of the box.

NOCO GENIUS 10 – budget

NOCO Genius 10

In case you have limited space in your garage but desperately need a battery charger at a reasonable price, the NOCO GENIUS 10 can work as a great compact and portable battery charger for diesel trucks.

This 6 and 12-volt battery charger also works as a battery maintainer and battery desulfator, so it will help you prolong the battery lifespan. It is rated at 10 Amps for lithium and lead-acid batteries with up to 230 Ah capacity. However, it maintains batteries of all sizes. Regardless of the compact size, it generates enough power (150W) to bring even a dead diesel truck battery to life. The charging time varies depending on the battery capacity and size, but it can take from 1.5 to 17 hours to fully recharge it.

The box includes the charger, an interchangeable connector, clamps, mounting bracket, screws, and the manual.

NOCO Genius 10 Picture

Just like NOCO GENIUS2X2, the GENIUS 10 model of the same brand is noted for outstanding features like automated microprocessor control, reverse clamp connection control, thermal compensation for flawless operation even in extreme weather conditions, and more. But all these features might not completely work to prevent overheating as the battery was too hot to touch when I checked it in 7 hours of charging.

The NOCO GENIUS 10 is a budget-friendly charger and maintainer that would become your reliable assistant when the batteries of your diesel truck get discharged.

Key specs

  • Voltage, V : 6/12
  • Charging current, A : 10
  • Battery capacity, Ah : 230
  • Output power, W : 150
  • Weight, lbs/kg : 3.33 / 1.5
  • Dimensions, inch/cm : 2.3 x 3.6 x 7.1 / 5.8 x 9.1 x 18

Pros

  • Compact size yet powerful (output power – 150W)
  • Suitable for 6V and 12V batteries with 230Ah capacity
  • Thermal compensation for smart charging even in extreme temperatures.

Cons

  • Heats up heavily during charging.

Schumacher SC1400

Schumacher SC1400

With the Schumacher SC1400, you can easily charge or crank the 6V and 12V batteries of your diesel truck or any other heavy-duty vehicle.

Offering 300 Amps for 12V and 200 Amps for 6V batteries, this engine starter and charger will get your car running again. This device works great for standard, AGM, gel, and deep-cycle batteries and provides a 60A boost (a continuous output current is 2/6 A).

Compared to another entry from my list – professional-grade Schumacher DSR124, the Schumacher SC1400 is a consumer-targeted model that would be a reliable helper in the household. At the same time, it shares similar features like microprocessor control to prevent overcharging, reverse hook protection, a digital display with LCD indicators, a convenient push-button, multi-stage charging, and float-mode.

With 4-gauge output cables that ensure up to 12 feet of reach, you will get the freedom to do the charging job even at a distance. The unit also has a convenient handle for easier transportation.

Schumacher SC1400 Picture

The charger works flawlessly and does its job as a charger pretty well. But the unit came with a damaged bottom, though the box was fine. When I turned it on, the device produced a strange loud noise (probably, because of the damage).

The Schumacher SC1400 is a quality battery charger for diesel trucks as it is packed with features that ensure its flawless use.

Key specs

  • Voltage, V : 6/12
  • Charging current, A : 12.5
  • Weight, lbs/kg : 41.5 / 18.8
  • Dimensions, inch/cm : 15.3 x 12.6 x 19.7 / 38.8 x 32 x 50

Pros

  • Compatible with 6V and 12V batteries
  • 200-300 Amps of charging current for charging two batteries
  • Microprocessor control for battery-friendly and safe charging
  • Long cables are handy and wheels make the unit easy to transport.

Cons

  • Sometimes arrived with a dented bottom.

NOCO GENIUS2X2

NOCO GENIUS2X2

Be always on the lookout when the batteries of your diesel truck die with NOCO GENIUS2X2. Being a fully-automatic and worry-free battery charger with two pairs of clamps, you will easily get back on track.

Since it is a dual charger (unlike NOCO GENIUS 10), it features two indicator panels to provide you with exact information on the selected mode, charging progress, and alerts, if any. Being specially designed for simultaneous recovery of 6V and 12V lead-acid and lithium-ion batteries, this charger extracts 4 Amps – 2 Amps per bank with a 40 Ah capacity range. 60 W of output power is enough to run two batteries.

The NOCO GENIUS2X2 charger is enhanced with interchangeable connectors, clamps, extension cords, screws, A, C, G, and I power cables, and a guide. Due to the charger design, you can mount it on the wall in your garage to keep the storage space.

NOCO GENIUS2X2 Picture

Even though the manufacturer claims that the charger will recover a completely dead battery in the force mode, my experience proved that it is not always the case. You’ve got to charge the battery up with something else until this NOCO unit recognizes a valid connection. But the significant perk of this unit is that it won’t be on as you reverse clamps till it finds the relevant connection.

The NOCO dual battery charger for diesel trucks is a great solution to power two truck batteries, which is a great time-saver.

Key specs

  • Voltage, V : 6/12
  • Charging current, A : 4
  • Battery capacity, Ah : 80
  • Output power, W : 60
  • Weight, lbs/kg : 1.1 / 0.5
  • Dimensions, inch/cm : ‎4.9 x 5.2 x 4.4 / 12.4 x 13.2 x 11.1

Pros

  • Supports dual battery charging to get back on track faster
  • 60 W of output power to charge two batteries with 40 Ah capacity
  • 4 Amps – 2 Amps for optimal charging speed
  • Compact and can be mounted on the wall.

Cons

  • Will not recover dead battery.

FAQ

How does a diesel truck battery charger work?

A diesel truck battery charger converts 120 volts AC into 12 volts DC. The 12 volts are used to charge the battery in a car. The charger has a transformer inside of it that converts the voltage. It also has a rectifier that converts the AC into DC and regulates the voltage to 12 volts. There is a fan inside the charger for cooling purposes.

How do you charge a diesel truck with two batteries?

You can charge a diesel truck with two batteries by hooking up the positive from one battery to a switch and then hooking up the positives together. Then use a wire to connect the negative from each battery. Then when you turn on the switch, it charges both batteries at once.

What happens if I flip the charging cables while charging the battery?

If you flip the charging cables while charging the battery, it will create a spark. This could cause a fire, so it is not recommended that you do this. Instead, always make sure to follow the instructions that come with your battery charger.

How to test a battery charger for a diesel truck?

To test a battery charger for a diesel truck, you need to use a voltmeter. If the battery’s output is lower than 12 volts under load, there is probably something wrong with your battery charger.

Should I charge my truck battery at 2 or 10 amps?

It is recommended that you charge your truck battery at 10 amps. This will help to ensure that the battery is charged correctly. Charging at a lower amperage can take longer and may not fully charge the battery. It is also essential to ensure that the charger you are using is rated for 10 amps or higher.

Can I charge the diesel truck battery without removing it?

You can charge a diesel truck battery without removing it from the vehicle, but it is generally not recommended. This can cause damage to the battery and possibly other parts of your vehicle.

How long does it take to charge a diesel truck battery?

It will take between 10 and 20 hours to charge a diesel truck battery using a regular charger fully. If you are using a high-output charger, it will take between 5 and 10 hours to charge the battery fully.

How long do diesel truck batteries last?

Diesel truck batteries generally last between 3-5 years, depending on use.