Best Car Battery Chargers: Smart and Portable

Review & Comparison, Last Update August 14, 2017
Without a doubt, a proper car battery charger is an essential part of any emergency kit for your vehicle. Dealing with a dead car battery doesn't seem to be that troublesome and challenging if you are already equipped with this device. To choose the right charger for you car battery just proceed to read our review! ...Read more ...Read less
BEST 2017
PROS
CONS
OUR VERDICT
Compatible Batteries
Output Current
Delivery Set
Special Features
Protection
Warranty
 
PROS

With an output amperage of 1.25A, it takes much less time to charge any battery with this charger than with most other models.

CONS

On rare occasions, indicators may show incorrect readings.

OUR VERDICT

Featuring the highest output current and fully automatic operation, this charger will reduce the charging time for even high-capacity batteries.

detailed parameters
Compatible Batteries

12V-batteries

Output Current

1.25A

Delivery Set

The charger, Ring terminals, Battery clamps

Special Features

Indicators (Charging, Fully charged)

Protection

Automatic switching between full charge and float charging mode,
Safety timer

Protection:

Reverse polarity,
Sparks,
Short circuit protection


Warranty

5 years


PROS

LED-indicators provide detailed information about the battery charge status and current charging mode.

CONS

The instruction manual included isn't detailed enough.

OUR VERDICT

The NOCO Genius G750 is a modern highly-protected charger which ensures an optimal charging of you car battery.

detailed parameters
Compatible Batteries

6V and 12V-batteries

Output Current

750mA

Delivery Set

The charger, Eyelet connectors, Battery clamps

Special Features

Indicators (Charging, Error, 12V/6V NORM, Standby)

Protection

Protection:

Reverse polarity,
Overcharging,
Sparks,
Overcurrent,
Open-circuits,
Short-circuits,
Overheating.

Water, shock, dirt and dust-proof, and rated at IP60

Warranty

5 years

PROS

The compact dimensions of the Battery Tender Junior allow you to carry and transport it comfortably in any vehicle or backpack.

CONS

The model comes with relatively short cables.

OUR VERDICT

This is a decent battery charger, which offers a good quality and an excellent value for money. The device ensures an impressively fast charging.

detailed parameters
Compatible Batteries

12V-batteries

Output Current

750mA

Delivery Set

The charger, Ring terminals, Battery clamps

Special Features

Indicators (Charge status)

Protection

Automatic switching between full charge and float charging mode

Protection:

Reverse Polarity,
Sparks


Warranty

5 years

PROS

The body of the charger contains special mounting holes, so securing the device in the needed position is a piece of cake.

CONS

The clips do not always provide a tight grip on battery posts.

OUR VERDICT

This smart and portable charger is capable of switching between charging mode and float mode automatically. It is a great solution for every car owner!

detailed parameters
Compatible Batteries

6V and 12V-batteries

Output Current

1A

Delivery Set

The charger, Ring terminals, Battery clamps, DC accessory plug

Special Features

Indicators (Charge status, Fault)

Protection

Protection:

Reverse polarity,
Overcharging,
Short Circuit

Warranty

1 year

PROS

The special suction cups allow attaching the device to a windshield to get a better exposure to the sunlight.

CONS

With this model, it is possible to charge batteries with a charge level of not less than 60%.

OUR VERDICT

The ALLPOWERS Portable Solar Сharger is a stand-alone device, which can maintain the charge level of your battery by charging it up when necessary.

detailed parameters
Compatible Batteries

12V-batteries

Output Current

250 - 280mAh

Delivery Set

The charger, Battery clamps, DC accessory plug

Special Features

4 suction cups for fixing the device on a windshield

Protection

Built-in diode preventing reverse discharge,
Water-resistant body

Warranty

18 months

What is a Car Battery Charger

Car batteries like any other batteries require recharging from time to time. For this, you need to use a device designed for this purpose — a car battery charger. This appliance plugs into a power socket and supplies the electricity with proper parameters to the connected battery. By using this charger, it's possible to charge up a battery of a car, motorbike, boat and other vehicles as well as power tools, equipment, etc.

To be sure of maintaining the engine of your car at its maximum efficiency and in a good condition, select the right motor oil! Additionally, in our reviews, you can decide on the appropriate car vacuum cleaner and car wax.

What Features to Compare

Compatibility

Selecting the right battery charger for a car, motorbike or a boat, first of all, check whether the device is compatible with the model you chose. Basically, each car battery has its rated capacity specified in Amp-hours (Ah), while chargers usually provide the value of the charging current or output amperage they deliver (A). If you want your device to charge the battery faster, you need to consider the models with a higher output current rate. However, it's equally important to know the voltage of the battery of your vehicle. Passenger vehicles and motorcycles are typically equipped with 6V and 12V batteries, while 24V batteries are commonly used on trucks and other transport devices with diesel engines.

Special Features

There are other important points to consider when choosing a vehicle battery charger. For example, extra connectors included in supply packages of some charging devices of this type provide more flexibility of use and simplify their connection to different battery posts. Some chargers come with built-in LED indicators that show battery charge status and provide information about the current device operating mode. 

Safety

As you have already known, it's very important to take safety precautions when working with electricity, and using a car battery charger is not an exception. To ensure user's safety of use, some chargers come equipped with crucial safety features such as protection from reverse polarity connection, overcharging, short circuit. As for protection measures, many of them may come integrated into the charger body, thus we recommend considering it carefully. The best options offer all the listed protection features.

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Battery Tender 022-0185G-dl-wh

Top of Its Class

Nowadays, there is a huge number of battery chargers available on the market, however, selecting the one that fully meets your expectations is a tricky business since not all of them provide an appropriate level of performance. The Battery Tender Plus Battery Charger/Maintainer has all the necessary features to provide a safe and fast battery recharging. The supply package contains ring terminals as well as battery clamps, so, it is possible to choose the charging connection that is most convenient for you. The key feature of this model is that it can perform battery charging in one of the four modes: initialization, bulk charge, absorption mode and float mode. With that, the device automatically detects the optimal charging mode when connected to the battery. As a consequence, the system protects the charger against an overheating as well as prolongs its service life. Well done!

The appliance is suitable for Wet Gel, AGM and VRLA batteries with a rated voltage of 12V. With a 1.25A output current, the battery charger can recharge your battery quickly saving you a lot of time! A special green indicator light (“fully charged”) will let you know exactly when the car battery is fully charged.

Thus, if you're still undecided about the charger for your car battery, going for the Battery Tender Plus Battery Charger/Maintainer is your best bet!

Review of Battery Tender 022-0185G-dl-wh Car Battery Charger/Maintainer

Ultimate Protection

As we've mentioned above, a significant benefit of the Battery Tender Charger/Maintainer is the availability of multiple protection features that guarantee the maximally safe and secure recharging process. The built-in protection against overcharging automatically switches this appliance to the float charging mode after the battery is charged. In addition to that, the model has the short circuit and reverse polarity protection onboard, to leave you with no worries about wrong connection failures!

Battery Tender 022-0185G-dl-wh Car Battery Charger/Maintainer in the use

Keep In Mind

Prior to recharging your car battery, it's practical to learn its current charge level. For this, you can take advantage of a car battery tester.

Detailed review of Battery Tender 022-0185G-dl-wh Car Battery Charger/Maintainer

Design of Clamps

Speaking of the charger conveniences, we'd like to note that apart from alligator clips with plastic handles, the Battery Tender Charger/Maintainer features a set of connectors for small screw terminals that simplify a connection to specific battery posts.

Battery Tender 022-0185G-dl-wh Car Battery Charger/Maintainer application

Additional Info

User Manual     Manufacturer


Battery Tender 022-0185G-dl-wh
Battery Tender 022-0185G-dl-wh
 

NOCO Genius G750

Makes The Difference

The NOCO Company offers one of the most cutting-edge devices for charging car batteries — the Genius G750 UltraSafe Smart Battery Charger. The device is suitable for Wet, Gel, MF, EFB and AGM batteries with a rated voltage of 6 and 12 volts. Thus, with this portable charger, you'll be able to charge up batteries installed on cars, motorbikes, quadricycles, boats and even lawnmowers. The charger copes well with charging dying or "sluggish" 30Ah lead-acid batteries. Just look at the practicability of this useful modern electric equipment! Moreover, the vehicle battery charger boasts a portable size of 4.4” x 2.7” x 1.5” inches, so it won't take up a lot of space in your car, unlike old bulky chargers. Despite such a small size, the charger ensures an output current of 750 mA. Equipping yourself with this excellent device makes it possible to bring back a depleted car battery to life easily and in short time. This parameter measures approximately two times higher than of the competitors. Awesome!

Review of NOCO Genius G750 UltraSafe Smart Battery Charger

Simple and Intuitive Control

The NOCO Genius G750 UltraSafe Smart Battery Charger automatically collects all the necessary information and current battery parameters and switches to the optimal charging mode. Two LEDs show the battery voltage level (6V or 12V), while the special indicators inform a user about the current battery charge level. Additionally, the big LED indicates that the battery is being charged.

NOCO Genius G750 UltraSafe Smart Battery Charger in the use

Are You Okay to Get Behind a Wheel?

If you were at a cocktail party and had a couple of drinks, you definitely shouldn't drive! As you know, buzzed driving is a dangerous driving. That is why if you are unsure of the current alcohol content in your blood and whether it's legal to drive in your condition we recommend taking advantage of a breathalyzer to check it out.

Detailed review of NOCO Genius G750 UltraSafe Smart Battery Charger

Most Convenient Connector

The charger supply package includes various X-Connect battery clamps, so, it'll be possible to select the most suitable option for charging the battery of your car in the appropriate and safe way. These clamps offer an advanced water-resistant connection and ensure a good contact with battery posts. Last but not least, X-Connect battery clamps have a built-in fuse protection providing advanced safety of operation, thus improving the user experience.

NOCO Genius G750 UltraSafe Smart Battery Charger application

Additional Info

    Manufacturer


NOCO Genius G750
NOCO Genius G750
 

Battery Tender Junior 021-0123

An Excellent Сombination of Functionality and Ease of Use

The Battery Tender Junior is one of the most compact chargers, which comes with the additional auto mode function. You will have no problems using this equipment since it doesn't require any special configuration or adjustment. The Battery Tender Junior automatically collects all the required data from the battery and then adjusts the output current and voltage based on these data. This function enables the car battery charger to use the optimal and fastest charging mode as well as prevent the battery from overheating during the process. Such functionality is implemented in the charger owing to the built-in microcontroller, which determines the actual battery charge level and the corresponding charging voltage. The charger has only one LED indicator, however, its two-color scheme allows displaying the complete information regarding the battery condition.

Review of Battery Tender Junior 021-0123 Battery Charger

All You Need Is to Connect!

Taking into account the fully automatic operation of the device, all you need to do is to connect charger clamps to the posts on your car battery with the corresponding polarity, and then plug the charger socket into your household outlet. Yes, it's that easy! The Battery Tender Junior comes with two pairs of different connectors, which are ring terminals and battery clamps, to offer you the selection of the common options of hooking up the charger to the battery terminal posts. Speaking of the device automatic operation in more detail, before initiating the charging the Junior 021 performs additional diagnostics and checks whether the polarity is observed. Thus, even if you connected the cables incorrectly, the special LED indicator will warn you about the wrong connection. However, we recommend reading the operation manual carefully before using the unit. Another great benefit of the Junior is the manufacturer 5-year warranty for the product!

Battery Tender Junior 021-0123 Battery Charger in the use

Think About It

If you're planning to have some rest in the outdoors with your family, friends or colleagues, consider taking a car inverter along. This device will let you use virtually any type of electronic gadgets away from a power socket. However, for using it, it needs to be fully charged.

Here, you can select the most appropriate car inverter!

Detailed review of Battery Tender Junior 021-0123 Battery Charger

Advantageous Feature

We'd like to point out that the included alligator clips and ring terminals allow extending the area of the charger application. The set allows charging batteries of vehicles, motorbikes, ATVs, scooters easily!

Battery Tender Junior 021-0123 Battery Charger application

Additional Info

User Manual     Manufacturer


Battery Tender Junior 021-0123
Battery Tender Junior 021-0123
 

Black & Decker BM3B

Easy to Use. Simple to Operate

With the advantageous design and automatic charging mode, the BM3B Battery Charger by Black&Decker really deserves a special attention. Actually, it is one the easiest-to-use models, all you need to do is just set the sliding switch to the right position (6 or 12-volt depending on your battery), attach the clamps to the corresponding posts of the battery and plug it in. The BM3B charger will do the rest! The BM3B charging equipment shuts off automatically when your car battery is charged completely. In addition, special indicators show the battery charging status. 
This Charger/Maintainer comes with mounting holes that can be used for a reliable mounting of the unit in a vertical or horizontal position on any workspace. For example, you can secure it right on a wall in your garage or in any other convenient place.

Review of Black & Decker BM3B Battery Charger / Maintainer

Great Supply Package

With its compact and practical design, the BM3B Battery Charger/Maintainer offers other important advantages. Apart from battery clamps and ring terminals, the model comes with a DC plug for charging the battery of your vehicle via a cigarette lighter receptacle. In some cases, the use of this connection brings benefits, as there is no need to open the hood to access the battery. However, it's important to make sure your car allows this way of charging.
To connect the charger to a battery, simply attach the positive (red) clamp to the positive (+) post on the battery and the negative (black) clamp to the negative (-) post. The BM3B Battery Charger/Maintainer features a protection against reverse polarity, thus in case of incorrect connection, the indicator will inform you about the misconnection.

Black & Decker BM3B Battery Charger / Maintainer in the use

Always Crucial

If you forgot to charge the battery of your car in due time or a cold, damp weather made it run out unexpectedly quickly, take advantage of a jumper cable!

Detailed review of Black & Decker BM3B Battery Charger / Maintainer

Charging through a Cigarette Lighter

Despite the fact that many cars feature cigarette lighter receptacles that work only when these cars are running, power accessory outlets are typically hardwired to the battery and always active. These outlets can be used as an input for charging the car battery.

Black & Decker BM3B Battery Charger / Maintainer application

Additional Info

User Manual     Manufacturer


Black & Decker BM3B
Black & Decker BM3B
 

ALLPOWERS 6244639

Utilize the Solar Power!

The ALLPOWERS Car Battery Charger stands out from numerous analogous solutions owing to its operation principle. Unlike most other chargers that plug into a socket to draw power, this device converts sunlight into electricity and sends it to the car's battery. The model provides a power output of 5W — it's enough for charging and maintaining the charge of your vehicle battery (however, the initial battery charge has to be no less than 60%) at the required level. With the size of 12.6 x 4.7 x 0.19 inches, the solar panel captures the necessary amount of sunlight to juice up almost any car battery. Besides, this car maintainer can be used with 12V batteries of cars, bikes, boats. Taking into account that the ALLPOWERS maintainer is a standalone solution, you'll be able to use it almost everywhere! All you need is a good sunny weather!

Review of ALLPOWERS 6244639 Portable Solar Car Battery Charger

Simplicity and Convenience

The device supply package includes two types of connectors as well as special suction cups. In addition to the standard battery charging clips, the model is shipped with a car charger cigarette lighter plug. So, it'll be possible to charge your vehicle battery via this plug without opening the hood (if your car supports this feature)!
You can either place the photovoltaic module right on the front panel of your car or attach it to the windshield. The charger is made to be water-resistant, so, don't worry about possible damage caused by rain.

ALLPOWERS 6244639 Portable Solar Car Battery Charger in the use

For Every Driver

A jump starter is an important device to bring back a car battery to life quickly and without any additional equipment. Don't miss the chance to choose the appropriate one for your vehicle!

Detailed review of ALLPOWERS 6244639 Portable Solar Car Battery Charger

Convenient Suction Cups

To place the solar panel in the most convenient and easiest way, it features 4 suction cups for attaching the module right to the windshield!

ALLPOWERS 6244639 Portable Solar Car Battery Charger application

Additional Info

    Manufacturer


ALLPOWERS 6244639
ALLPOWERS 6244639
 

FAQ:

Q: Does the size of a car battery charger matter?
A: Yes, it does. Using a smaller battery charger than recommended typically takes longer to charge the battery to the same level. However, if you are planning to use the charger only for the maintenance, it will handle this task quite easily. A car battery charger with higher output current will charge batteries quicker but may shorten their lifetime.

Q: Is it important to ensure correct charging voltage?
A: Basically, the value of float and high rate voltages is determined and specified by the battery manufacturer. It depends on two factors: battery chemistry and its build. Deviating from the recommended values will naturally result in the battery undercharge or overcharge, and therefore reduce the battery’s lifetime and performance.

Q: What is a maintenance mode of a battery charger/maintainer?
A: In a maintenance mode, the charger/maintainer keeps the full battery charge at the same level by supplying the current in small portions when necessary. Typically, if the actual battery voltage drops below a certain preset level, the unit switches to the charging mode and performs the charging until the battery voltage returns to the full charge level. Then the appliance switches back to the maintenance mode. Usually, chargers switch between these modes automatically.

Q: How long can I leave my charger connected to my battery?
A: It actually depends on the type of the vehicle battery charger you use. Typically, a battery charger should be left connected to a battery in your car until the battery is fully charged. If you're planning to utilize a manual charger, it should be disconnected as soon as the battery charge level has reached its full. The point is that such chargers do not shut down by themselves and continue to supply electricity to the battery even in case the battery has got already charged. Automatic chargers in their turn usually ensure optimal charging mode and prevent overcharging of the battery. Automatic chargers don't change operational parameters of a battery to such a large extent as manual chargers, however, they are also not designed for an uninterrupted use with batteries. Therefore, it's reasonable and safer to disconnect car battery chargers from your battery after the charging is complete.

Q: What is a microprocessor-controlled smart battery charger?
A: A microprocessor-controlled battery charger is a device which controls all aspects of a battery charging to increase the charging rate and lifetime of the battery. Basically, these chargers collect all necessary information from the battery and adjust the charging current and voltage based on this information. This approach enables the charger to charge your battery quickly, and completely. In addition, a fast intelligent charging doesn't affect working parameters of the battery and its lifetime. 


Sources:

1. What are the 3 Stages of Smart Chargers? BatteryStuff.

2. How to Pick the Right Battery Charger, BatteryStuff.

3. Tips for Choosing the Right Car Battery Charger, DoItYourself.com.

4. Automotive battery, Wikipedia. February 26, 2017.

5. Car Battery Chargers Buyers Guide, Halfords.

6. Selecting the right battery charger, RACQ.

7. How to Use a Car Battery Charger, HowStuffWorks.

8. Valerie Johnston All About Car Battery Chargers, YourMechanic. November 24, 2015

9. Using a car battery chargerHow a Car Works.

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