Best Car Battery Charger for Dead Battery

Although a car battery is easy to replace, you should take care of it. One way of maintaining it is by charging it. In this post, we will review the ten best car battery chargers for a dead battery. Aside from in-depth reviews of each product, we have also provided a buying guide to help you in selecting the best out of the many. Read on to find out more.

Best Car Battery Charger for Dead Battery

Comparison Table of 10 Best Car Battery Charger for Dead Battery

You are likely reading this post because you hate having battery trouble. Nobody likes the frustration and tedium of performing a jumpstart on a dead battery. Aside from the jumpstarting, the regular jump starter kit isn’t easy to connect and carry around. The first option on this roundup goes against the grain.


At first glance, it is clear this isn’t your typical car charger. It comes in a compact, portable body. It weighs 2.82 pounds. Due to this, you will not feel inconvenienced carrying it with you. The portable size means you can throw it into a bag or car glove box. Additionally, the car charger has a carrying case. The carry case is sturdy and protective. It also has enough space to accommodate other accessories.


Because it is small, compact, and lightweight, you might suppose it is an entry-level charger. It has a peak output of 800 amps. Thus, it can jumpstart a vehicle with a 7.2L gas or 5.5L diesel engine. Furthermore, the 1800mAh capacity makes it quite versatile. When not jumpstarting your vehicle, it can charge up your other devices. This ranges from your smartphone to tablets and even laptops.


This car charger also has safety features to ensure the health of your battery. It eliminates issues like short-circuiting and overcharging. It does come with some flaws. For instance, if you have less than 30% charge, it would be a hard task jumpstarting anything.


It is one of the best portable battery chargers for cars on the market.

Pros
  • It has a compact, lightweight design
  • Can charge other devices
  • Comes with safety features
Cons
  • Doesn’t work well on a low charge
  • Poor instruction manual

The next option on this roundup is an ingeniously designed charger. It delivers excellent charging performance. Battery Tender Plus has a nice clever design. That underlies the efficiency of its charging.


It is a high-end option that can charge a wide variety of vehicle batteries. One reason why it is so highly rated is the dual charging mode. The first one is float charging. This mode allows you to charge when you aren’t close to the battery. The other is the full charge mode.


Thus, it can charge a dead battery and maintain it at the best voltage. Trickle chargers on the market can damage your battery. Yet, this unit can trickle charge without causing any damage to your battery.


Another reason why this device ranks highly is that it is temperature adjusted. What does this mean? Well, it indicates that it can adjust its output depending on what it is used for. Thus, the floating and full charge modes are regulated by the device.


One important consideration is charging time. Well, since this unit is a 1.25 amp, it charges your battery quickly. As it charges your battery, it does so safely. It has safeguards against reverse polarity and short-circuiting. This is like the first unit reviewed above.


As more cars depend on electricity now and in the future, you will need a reliable car charger like this device. It offers more power, is faster, and safer than several other units on the market right now.

Pros
  • Comes with all required accessories
  • Safe to use
  • Impressive 10-year warranty
  • Nice design
  • Combats drainage
  • Easy to use
Cons
  • Small clamps
  • Non-waterproof casing

The NOCO Genius G3500 is a charger that maintains a wide variety of batteries regardless of size. It is compact and quite durable. The design is dust, water, and shockproof.


This unit is capable of not only charging but also maintaining 12V and 6V lead-acid batteries. This feat alone makes it a good option. It is elevated from being okay to be a great option because it also charged lithium-ion batteries. Thus, it is one of the most versatile options that you can buy. It can also repair batteries. If your battery suffers lost capacity, you will find the progressive battery recovery method handy. The G3500 recovers batteries that fall as low as 2V.


It is important to keep an eye on the battery as you charge it. Unfortunately, you cannot do this throughout the duration of charge. The G3500 comes with handy safety features. It helps to watch charges to stop overcharging. Additionally, the reverse polarity protection ensures that your battery is undamaged. This is useful when clips are wrongly connected.


G3500 is very easy to use. Things are simplified since it has one button. The button allows you to choose the size and type of battery you wish to charge. This unit also comes with an LED that indicates when the charger is working.

In fact, you can leave the charger connected to the car battery for a long time without damage. This is because of the useful safety features, especially the zero-overcharging feature.


It is an excellent battery. It comes with a 5-year warranty that protects you in case any issues arise.

Pros
  • Durable construction
  • Lightweight and compact
  • It can bring batteries as low as 2V alive
  • Fast charging
  • Safety feature like zero-overcharging
Cons
  • Lacks a voltage gauge

This excellent device is quite easy to miss. It would be easy to walk by, thinking that it cannot give you anything but the bare necessities. But, you’d be mistaken.


This model, despite the small size, comes with several useful features. It is easy to throw into your car glove box and other small spaces. It comes with features that make it a near-complete package.


First, this unit has enough juice to prevent you from being stranded.


It features a compact and durable build. Thus, it can last for a long time. The casing features a trio of LED light indicators. Although these do not tell you much, they are enough to show you how much charge you have.


If you are looking for a portable, multi-purpose and affordable car charger, then you should consider this unit.


Other features include an LED flashlight and SOS light. You can also use it to charge other devices since it has a USB 3.0 port. The SOS battery lasts for up to 120 hours without recharging.


It is safe to use. It has protection from short-circuiting, overcharge, overvoltage, and overload. Thus, you can use it rest assured that no damage will occur to your battery.


Although you need to be a little patient since it only jump starts 4 times every 2 minutes.
Pros
  • Compact, lightweight build
  • Easy to carry around
  • Powerful
  • Safe to use
Cons
  • It cannot jump start large engines
  • Poor power storage

While others on this list boast multi-function capabilities, this unit is more focused. It will not do fancy things like charging your other devices. But if you seek an option dedicated solely to jump-starting your car battery; then this is likely for you.


It is the largest on this list. It is also heavier. Yet, this is a good thing since it means that it offers more power. While it is heavier and larger than others on this list, it is still easy to move around. The 18 pounds of weight shouldn’t prove too heavy to carry.


It comes in a distinct blue color and has in-built jumper clamps. The build is quite durable. Thus, you can be sure that it will last you for a long time.


Jump starting a dead car battery needs a significant amount of power. This unit delivers that power. It is one of the most powerful car battery chargers on the market. You’d be hard-pressed to find something more powerful than the 1700 peak Amps cranking power. Cold-cranking rated at 425 CCA makes it still impressive as well.


While it does not come with many safety features as others reviewed, it still has some good features. For example, the jumper cables and clamps are insulated and spark-resistant.


The build doesn’t include a digital display. Yet, it makes up for this through the easy to decipher battery test gauge. The feature is handy if you have a weak battery.


Loved the lengthy jumper cables that are easy to connect to the battery. Considering the power, they will have to hold; it’s not surprising that they are thick and durable.

Pros
  • Plenty of power
  • Durable build
  • Long and thick jumper cables
Cons
  • Short warranty period
  • Bigger and heavier than other models

As long as you have a car, you should have a battery charger handy. Your battery seldom gives any sign of dying on you. Thus, failing to prepare for such an occurrence can be costly. Best units that can help you stay alert is this battery charger. It is a portable unit that doesn’t take up plenty of space in the car.


This excellent unit is an excellent battery charger. But that isn’t all it can do. You can also use it as an engine starter. That’s pretty useful, isn’t it?


It plays both roles efficiently. With a maximum amperage rating of 50 amperes, you can rest assured of enough power to resurrect your flailing battery. Furthermore, this unit has a 10A battery boosting ability. This makes it the right unit for boosting your battery. It also charges the battery with the 6A charging rating and 2A maintaining rating. It is one of the easiest options to use on this list. This model is straightforward. Simply connect it to your battery, turn it on, and select the mode you want to use. From that point onward, it will charge the battery until it is full. Once full, it automatically enters maintenance mode.


This device will help to cut sulfation in your wet cell battery. You can also float your battery via the float mode. Thus, you can store your battery and have it ready to use whenever you need it.

Pros
  • Compact and portable design
  • Doubles as an engine starter
  • Easy to use
  • Maintains the health of your battery
Cons
  • Expensive
  • Needs to be plugged to an electrical outlet

Next up is an excellent battery charger that can get your car’s battery up and running in a short time. The Stanley BC25BS battery charger is quite compact yet powerful.


Due to the relatively small size, you can throw it in tight spaces conveniently. It comes with a rubber casing that protects it from bumps and drops. Since it is quite portable, you’d be surprised at how frequently you might drop it. Thus, it needs all the protection it can get.


It has four main functionalities that make it one of the best 12 volt battery chargers on the market.


First, there is the patented engine start feature. We love this feature because it quickly starts up your car’s engine. In fact, because of this feature, your car’s engine can start in a minute and a half. Thus, if you are stuck in a scary neighborhood, you’ll find this useful.


Another function we love is the battery charging design. It does all the configurations itself. Many people do not know their battery type or size. Thus, this feature comes in handy.


Once it reaches a satisfactory charge level, the device switches. It enters a top-off mode that trickle charges the battery. Now, many folks have issues with trickle charging. Yet, rest assured that trickle charging with this device is safe for your battery.


The reconditioning function serves well to protect the health of your battery. Additionally, you get an alternator check feature. As the name implies, it monitors the alternator. This is essential if you want to maintain excellent battery levels.


On the safety end, it is quite safe for you and the battery. It jettisons errors as it has a clear LCD screen. It serves to keep your battery alive and healthy.

Pros
  • Very easy to use
  • Jump starts in 90 seconds
  • LCD screen is easy to read
  • Protects your battery and maintains optimum levels
  • Compact unit
Cons
  • It won’t charge a totally dead battery
  • Fan might be noisy

Schumacher is a popular manufacturer of car chargers. The manufacturer makes quite excellent units. Earlier in the post, we considered the SC1305, which is one of the best portable options on the market. Now, we will consider a bigger model; the S-4022.


This unit is one of the best heavy-duty battery chargers you can buy. It is designed for owners of fleets or many cars. But even if you have one vehicle, you can still use it.


It is a compact unit that gives a boost whenever you need it. It weighs 37 pounds; which is one of the heaviest on this roundup. Yet, you can wheel it around.


It is a versatile unit. To that end, it can charge either 12V or 6V batteries. Due to the 200A of power, it can jump-start your engine. It is thus one of the best 200 amp battery chargers.


If you want something less jarring, you can use the 40A capacity. It charges slower and more regularly. And when you want to maintain the charge, you will find the 2A trickle charge feature handy.


As stated above, the 200A mode is for rapid start and is excellent for emergency situations. Other modes are slower. For example, when set at 40A, it will charge for about an hour or three.


Aside from the charging ability, this unit also doubles as a tester. This function analyses your car system and detects any issues.


There is a cooling fan to protect from overheating. It is an excellent option that will last for a long time.

Pros
  • Different charging modes
  • Can start a dead battery
  • Easy to assemble
  • Comes with wheels and handle
Cons
  • No auto-shutoff

The MOTOPOWER MP00205A is a popular option among car owners looking for a portable option. It has a handheld design that offers a good grip. You can also mount it via the case bracket.


The MOTOPOWER works with car batteries, lawnmowers, toys, and other vehicles. Thus, if you want a multi-purpose option that you can carry around; this is a good bet.


It is aided in popularity by the ease of use. As an automatic battery charger, you don’t have much to do in setting it up. It is a typical plug and use device. Thus, even novices find it great to use.


It works out the whole charging through the microprocessor. Because of this, your battery would not run the risk of overcharge. As soon as the battery is full, the charging is stopped. Once this occurs, it continues to track the charge level. Any drop off in charge level is corrected via the floating current.


This feature is both a safety and functional feature. Aside from this, there are other features. Some of these safety features include reverse polarity protection. There is also a feature that prevents discharge.


When combined, all these features serve to improve the lifespan of your battery.


Another useful feature is the SAE system. It allows you to connect and disconnect the connection options of the charger.


It is efficient and saves as much power as possible. For example, it has zero voltage when plugged in but not connected to a battery.

Pros
  • Versatile
  • Efficient performance
  • A plethora of safety features
  • Portable
Cons
  • Middling power
  • Poor LED indicator design

The last option on this roundup is one of the smallest options you will find. Yet, it is quite powerful in its own right.


If you suffer battery trouble, then you need a charger that is easy to take around yet efficient. It is a versatile unit that can jump start your car, bike, or boat. The caveat is that the engine must be 7L (petrol) or 5.5L (diesel).


Due to the small size, it can fit small spaces like a glove compartment easily. Thus, it is definitely more powerful than you might assume. Furthermore, the 18000 mAh capacity allows you charge other devices.


Since it is quite powerful, it has several safety features. These include reverse polarity protection, short circuit protection, and more.


There is an SOS light that can come in useful in emergencies. You also get LCD indicators to show power levels.

Pros
  • Compact and portable
  • Powerful
  • Plenty of safety features
Cons
  • Durability issues

Buying Guide of Car Battery Charger

From the roundup above, we have considered ten of the most powerful car battery chargers for dead batteries. There are several options on the market, but we have narrowed down the choices. Thus, it will be easier to choose from ten rather than from the hundreds on the market. Now, in making our list, we considered several factors.

Features to Consider Best Battery Charger for Cars

Portability

Since you might need to use the charger on the road, it only makes sense then, to buy a portable charger. Some of the products reviewed above come in small sizes. Some can fit into your glove compartment or a small bag. While there are some large options, these are being phased out.

The current trend composes portable, lightweight units.

Ease of Use

Driving a car does not confer knowledge about car parts. You will agree that not all drivers are mechanically inclined. Thus, it is important that the unit is very easy to use and fast.

The products we reviewed above have been selected with usability in view. Some of them come with useful features that improve usability. Examples of these features include flashlights, LED lights and more.

Furthermore, some units do not draw plenty of power. Some models are designed to take power from the cigarette lighter in the car.

Another useful feature is the ability to charge other devices. Thus, you’ll find them with two or more USB ports.

Indicators

Indicators are easy to take for granted. But, pick up a car charger without an indicator, and you’ll better appreciate them.

The best rated car battery charger usually comes with indicators. These are very useful in keeping track of the performance of the battery. Thus, they help you to know when it is charging, when it is full, and when it requires recharging.

Indicators are also integrated with safety features. An excellent charger will state when issues arise. Some of these include overcharging or reverse polarity.

With indicators, you are less inclined to make costly mistakes.

Indicators are useful for all drivers; especially for those not mechanically inclined.

Power

The source of power is significant. Many of the options on the market, including several on this roundup use 12V batteries.

But, these chargers offer power ranging from 6A to 20A. The amount of power offered is also essential. If the charger doesn’t deliver enough power, it would be too weak to strengthen your battery.

Thus, the higher the amperage, the more powerful the charger is. And the quicker it would charge your dead battery.

The main downside of powerful models is the cost. They are often expensive. Yet, if you are looking to leave a tight spot quickly, you’ll be glad to cough up extra bucks.

Safety

There is no point buying a car charger that would damage your battery. Thus, it is important to look for safety features in your purchase.

There are several safety features found in the best car chargers. Some of the essential features are:

  • Float mode
  • Spark proof clamps
  • Battery tester
  • Reverse polarity alarm

Smart Battery Charger vs. Normal Charger

There are two broad classifications of car battery chargers: smart and normal.

Having this knowledge will help you make an informed buying decision.

The normal battery charger is the typical jump starter. It delivers a low rate current to your battery. This current brings your battery to a full charge. While it is simple enough to understand, it has been the death of many batteries. A normal battery charger continues charging the battery at an equal rate to that of discharge.

Sounds simple, right? Well, it’s a good option, but it increases the risk of overcharging your battery permanent damage.

A better alternative is the smart car battery charger.

Advantages of Smart Car Battery Charger

Better Safety

A smart charger excels at protecting your car battery. It comes with several safety features. Unlike normal battery chargers above, these are automatic. This feature ensures that you do not connect wrong terminals that can result in damage.

Furthermore, these chargers come with spark-resistant clamps. Sparks might seem innocuous, but they can cause fires. Furthermore, the sparks can spoil your battery and even the charger.

Pulse Maintenance Technology

Remember how we said normal chargers can cause overcharging? Well, smart car chargers reduce the chances of that happening. Thus, you can keep the charger connected to the battery for several months on end.

While we do not advise doing this, it’s good to know that forgetting the charger and battery won’t result in critical damage.

Excellent Charging

The typical smart car battery charger passes through several stages, ranging from three to eight. These stages are essential to ensuring efficient charging of batteries.

These chargers can bring even dead batteries to full capacity quickly and efficiently.

Longevity

The more you charge a battery, the less charge it can hold over time. This holds true for several batteries, from smartphone batteries to car batteries.

But, the rate of decline is slower when you use a smart car battery charger. The technology used in these chargers charges the battery only when required. So, you reduce the occurrence of overcharging, which shortens the battery’s life.

How to Use a Car Battery Charger

It is important to know the right way to use a car battery charger. Since this is electricity, safety is paramount.

Car chargers come with different features that govern operation. Even so, there are basic steps that can guide every user.

Before you do anything, ensure that the charger is switched off. Do not make any connections while it is switched on. If your charger were on before connection, it would result in sparks.

With that out of the way, let’s see how to use the charger.

Connect the positive cable from the charger to the positive on the battery. Do the same for the negative cable and terminal.

Switch on the charger and adjust the settings if required and if possible.

Keep an eye on your indicators to prevent any issues.

Some of the units on the market are adjusting. Some reviewed above do not need any input from you. They can detect the type and size of the battery and charge.

It is important not to move the cables during charging.

If you have any adjustments to make, ensure that you switch off your charger.

Once adjustments are done, you can reconnect: with the positive cable going first.

Why You Should Follow Guidelines

Failure to follow the instructions can result in damage to your battery and the charger. It can even cause electrocution or fire.

How to Keep Your Battery Running Longer

A typical car battery can last for up to 5 years. But some do not last up to that. There are many forces at work that determine the lifespan of your battery. Some of these factors are unchangeable, while others can be manipulated.

A working battery already produces heat. If you ride on a hot summer day, then it can speed up the degradation of your battery.

In hot climes, batteries degrade faster. The fluid is evaporated, and the internal structure is compromised.

Regardless of the weather, though, you can manage your battery and make it last for longer.

Let’s see how.

Reduce short rides

Short rides stop your battery from full charge. Extended trips do the opposite. Thus, if you can, avoid short rides. If it isn’t avoidable, get yourself one of the best portable battery chargers for cars reviewed in this post. These batteries will help to maintain the health of the battery.

Secure the battery

If the battery is loosely secured, it would vibrate more agitatedly. This will likely lead to damage and short circuiting.

Thus, ensure your battery and the terminals are securely tightened.

Lights Out

One contributor to dead batteries is forgetfulness. Many people leave their lights on for extended periods.

Thus, avoid this. Put a reminder on your phone to remind you to check. Or you can go old-fashioned by placing a stick-it note on your dashboard. The aim is to ensure all lights, not in use, are switched off.

Reduce corrosion

Since battery terminals are made of corrosive materials, you must guard against it. How can you prevent corrosion? Well, it’s simple.

Clean the terminals regularly. A fine-toothed brush can do wonders and get rid of grime and dirt. You can use baking soda mixture to clean and rinse with water. Remember to clean the water with a clean dry cloth.

Frequent battery tests

Use a battery tester to learn the health of your battery. Some of the best heavy duty battery charger come with testers.

Reduce the load

Regardless of how well you care for the battery, the load on it will cause some wear and tear. You can reduce this by switching off lights, fans, ACs, and the radio when not in use.

General Vehicle Upkeep

Remember to care for the whole car. As you do check-ups on your health, remember to do the same for your car. This will ensure that problems are nipped in the bud before they become serious.

FAQ

1. What is the Best Car Charging method?

Using a high-quality car battery charger is an excellent method.

It is even better if you use a smart car charger. All you need to do is plug it to the terminals and turn it on. It will do all the work for you!

2. Can I Charge a Dead Car Battery?

If the battery died due to disuse, or you didn’t turn off your car door, then you can resurrect it. Many of the units we reviewed can help with this. In fact, some can resurrect batteries as low as 2V!

Yet, if the battery died of ‘natural’ causes, then it might be impossible to charge it. Each battery has a lifespan. And once this lifespan is exceeded, it would lose most of its ability. In such cases, you would have to buy a new battery.

3. Can you damage a battery by leaving it connected to a charger?

Yes. Especially if you connect it to a normal car battery charger. The battery would overcharge and can even cause damage to the charger.

A smart charger comes with auto-shutoff features that will prevent this from happening.

4. Are Solar Car Battery Chargers Effective?

Well, they do. Yet, they are useful as trickle chargers. This is because they do not have as much power as regular batteries.

They deliver an energy output of between 500Ma and 1500mA. This is small when compared to other chargers.

5. How often should I Trickle Charge my Car Battery?

The trickle charger slowly adds a charge to the battery. These chargers come in different types. Some are coupled to the battery, while others can be used intermittently. For most good batteries, you might only need to trickle charge for a few times over their life cycle.

6. How much voltage do you need to charge a 12V battery?

It will charge as long as the charger has a higher voltage than the voltage present in the battery.

The smart chargers reviewed above will adjust the voltage to give you the right amount

7. How do I know when to change my car Battery?

There are some factors to consider before changing the battery. Look out for these signs.

  • The engine starts slowly
  • Your lights aren’t bright, and you have electrical problems
  • Your ‘Check Engine” light is on
  • Your terminals are corroded
  • The battery swells
  • It is old ( 3 to 5 years)

Conclusion

The car battery might be a physically small part of your car, but it is important. Choosing the best car battery charger for dead battery can be hard. There are so many options on the market. Scroll through the options and pick that which suits your needs. Remember the tips above can also help you maintain the health of your battery and ensure that it lasts for as long as possible. It can be tough choosing the right one; especially without having correct information. But using this guide and review will help you to choose the best one for your car.

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