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TOP7 Best Car Battery Chargers 2018

What Is Car Battery Charger, and How Does It Work?

Battery charger serves to restore energy of vehicle’s accumulator and helps to supply all car electronics with it when the engine isn’t working. Without a battery, a car cannot start, and an alternator won’t function at its full capacity. The principle of work is pretty simple: a battery charger puts energy into the battery by putting voltage or electric currents through it: it rearranges chemicals inside the battery to their initial state.

Types of Car Battery Chargers

The choice of device depends on the batteries used in your vehicle. The following kinds of chargers are distinguished:

  • A simple charger supplies DC power to the object charged. Its power isn’t adjusted to the time of battery charging or the degree of charge. A simple charger requires more time to ‘juice up’ the battery (that helps to prevent serious over-charging), but still you shouldn’t leave the battery for too long – it can be destroyed or weakened.
  • A trickle charger is traditionally applied for batteries of low capacity, though it can also be applied to stronger batteries (with more than 30 Ah of capacity), which are designed for bigger machines like cars and boats. Trickle chargers are sufficient for maintenance, or trickle currents (the finishing charging stage).
  • An intelligent or a smart car battery charger can stay connected to the battery for hours without affecting it. They adjust the output power according to the percent of battery charge. A smart charger monitors battery’s temperature and voltage to calculate optimal time and current of charging. An intelligent charger starts charging the battery at full capacity during the first hour and then switches to the mode of trickle charging.

Comparison Table: Best Car Battery Chargers


Battery Tender Plus 021-0128, 1.25 Amp Battery Charger Battery Tender 

DBPower is a versatile charger for car engines and electronics.DBPOWER 600A

One of the most compact car battery chargers, Noco Genius is efficient and multifunctional.NOCO Genius 

GOOLOO jump-starter is suitable for different types of vehiclesGOOLOO 450A

Beatit charger has a very high capacity for performing tens of jump-starts of car engines.Beatit 800A Peak

Rugged Geek RG1000 has multiple USB ports.Rugged Geek

Battery Tender Junior is a cheap and versatile solution for being used on-the-goBattery Tender

Voltage 12 V 12 V 12 V/ 6 V 12 V 12 V 12-19 V 12 V
Weight 2.3 pounds 1.1 pounds 1 pound 1,75 pounds 1.19 pounds 15.8 ounces 1.8 pounds
Indicator lights Yes LED Display + Flashlight Yes Yes (LED) Yes (LED screen) Yes (LED screen) Yes
Amperage 1,25 A 600 A 3.5 A 450 A 800 A 1000 A 750 mA
Protection Reverse polarity protection Current, short circuit, overload, over-voltage, and over-charge protection Spark-proof technology, reverse polarity and overcharge prevention Over-current, short-circuit, over-voltage, and  over-charge prevention Current, short circuit, overload, over-voltage, and over-charge prevention Current Reverse polarity
Smart Charging Yes (4 Stages) Yes Yes Yes Yes (intelligent clamps) Yes Yes (4 Stages)
Warranty 10 years 3 Years 5 Years 12 + 6 months 2 years 12 months 5 years

Interesting Facts

This is what a typical car battery charger looks like

  1. Typically, a car battery’s life lasts about six years depending on exploitation. Using electronics too often and leaving headlights on shorten battery’s life.
  2. Despite the widespread myth, pulse chargers are not better than chargers with constant voltage for sulfated batteries. There’s no definite proof that some additives can prolong battery’s life.
  3. The smarter the automotive car battery charger is, the more battery lifespan you can expect.
  4. Although some drivers claim that using batteries in cold weather kills them faster, hot weather is damaging for batteries, too. Parts of the battery can melt, and it loses charge quicker.
  5. Depending on battery kind and temperature, it can experience self-discharge or natural loss of electrochemical level at 1-25% rate per month.

How We Chose The Best Car Battery Charger

To figure out the best car battery charger 2018, we read hundreds of feedbacks and evaluated ratings of some popular models. This Top-7 is based on numerous car battery charger reviews, as well as our experience. We took the below-mentioned devices for a spin and checked how quick and safe they were.

Top-7 Car Battery Chargers: Reviews

In this chart, you’ll find short reviews and characteristics of each model with both advantages and drawbacks.

Battery Tender Plus 021-0128, 1.25 Amp Battery Charger

Battery Tender Plus 021-0128, 1.25 Amp Battery Charger

This smart charger ensures optimal voltage by adjusting to the temperature, and can select the right mode: full charge or float charge. Although it has pretty low (1,25 A) voltage, it can charge your car battery as quick, or even quicker than a 3A charger. No side effects of trickle charges appear.


  • switches modes automatically;
  • has two indicator light;
  • connects easily;
  • fast charging.


  • relatively heavy;
  • doesn’t charge dead deep cycle batteries.
DBPower is a versatile charger for car engines and electronics.

DBPOWER 600A 18000mAh Portable Car Jump Starter (up to 6.5L Gas, 5.2L Diesel Engine)

DBPower is truly worth being called the best portable car battery charger so far. This is a multifunctional device that comes with smart protection clamps, LED flashlight and display, and even a compass. This compact model allows performing up to 30 jump-starts on diesel and gas engines, and fits the glove compartment. Smart charging makes it possible to use it for fully charging a car battery, laptop, smartphones, tablets and many other devices with a USB port. Gold clamps prevent, overload, over-charge, short circuit and over-voltage. According to portable car battery charger reviews, this device is recommendable for drivers going long distances.


  • high capacity (18000mAh);
  • compact;
  • features an LED screen and flashlight.


  • if the battery has a very low charge level, the device may fail to jump-start your engine;
  • users need an instruction to exploit it.
One of the most compact car battery chargers, Noco Genius is efficient and multifunctional.

NOCO Genius G3500 6V/12V 3.5A UltraSafe Smart Battery Charger

Searching for a 6-volt battery charger for a toy car? Pay attention to NOCO Genius G3500: this model combines charging and maintaining and allows switching between 6 V and 12 V. It works with various systems, including micro-hybrid machines, and CANBUS electric systems, and can charge Lithium-ion and lead-acid batteries. Some of portable car battery charger reviews claim it can revive dead batteries. The smart charger monitors battery activity and automatically switches charge modes.


  • smart charging;
  • lightweight and compact;
  • water- and UV-resistant;
  • compatible with CANBus systems.


  • works not with all batteries;
  • relatively expensive.
GOOLOO jump-starter is suitable for different types of vehicles

GOOLOO 450A Peak Car Jump Starter (Up to 4.0L Gas or 2.5L Diesel Engine)

Another great portable car battery charger is offered by GOOLOO: the model features a top-notch Li-Ion battery cell, which allows jump-starting almost any vehicle, including a car, a motorcycle, a tractor, lawn mowers, light-duty trucks, ATVs, oil boats, and so on. Thanks to the overall capacity of 10000 mAh, GOOLOO Jump Starter GP03B can perform up to 20 jump-starts, and be applied to charge tablets, smartphones and so on at the speed up to 2 A/sec. To top it off, the model has LED flashlight and may signal for help.


  • multiple protection features;
  • lightweight and portable;
  • withstands low and high temperatures;
  • comes with 3-in-1 USB port.


  • one Li-ion battery needed;
  • short cables.
Beatit charger has a very high capacity for performing tens of jump-starts of car engines.

Beatit 800A Peak 18000 mAh 12V Portable Car Jump Starter (Up to 7.0 L Gas or 5.5 L Diesel Engine)

This top-rated car battery charger features everything you need for long-term traveling in your car. It can jump-start your vehicle up to 30 times with heavy-duty clamps and 800 amps current. The set is lightweight and compact, it can fit your glove compartment. Total recharging takes about 5.5 hours, and power bank charger with 18000 mAh Battery Capacity can also be used to charge your smartphones, laptops, or any other device at the rate of 2.1 amps (which is twice faster than with usual power banks).


  • has 2 USB charging ports;
  • SOS flashlight is helpful in emergency situations;
  • comes with the portable compressive case;
  • high capacity.


  • fails to charge some car engines.

Rugged Geek RG1000 Safety 1000A Portable Car Jump Starter

Need the best battery charger for a car with multiple USB ports? Pay utmost attention to Rugged Geek RG1000 Emergency Jump Starter: it features 2 USB ports, 1 laptop port, and Micro USB port. The model has LED screen indicating the percent of charge, output level, and other important information. Flashlight with SOS mode are useful for travelers.


  • low discharge rate (1-2% a month);
  • cables with dual power tip clamps;


  • if it’s charging, it cannot be used for output simultaneously;
  • expensive;
  • not powerful enough to restart dead batteries and restore some car engines.

Battery Tender 021-0123 Battery Tender Junior 12V, 0.75A Battery Charger

Those who are in search of a cheap car battery charger should opt for Battery Tender Junior that ensures fast smart charging (4 steps of charging) and prevents overcharging. 80-hours safety timer guarantees a long lifetime, and switch to the float charging is automatic. This device can be used for sealed and many other batteries. Two LED indicators show the stage of the charger.


  • lightweight and compact;
  • cheap;
  • suitable for all types of vehicles.


  • some customers complain it breaks after several months of use.

How to Use Car Battery Charger Smartly

The most difficult part was finding a perfect car battery charger. “How to use it”, – users ask next. It’s pretty easy. First and foremost, learn all buttons and what LED lights mean: it’s crucial to understand the principle of charger’s work, and what every dial means.

Connecting the Charger to the Battery

As soon as user learns all specifications of the device, he can connect it with the battery. There’s no need to remove the battery. The positive (red) clamp is to be connected with the positive post of the battery (“+”), the negative (black) – to the negative post ( “-”).

Set the Charger

The next step presupposes setting the amperage and power of the charger (if it’s not a smart one). In order to set up trickle charging mode (if there’s enough time for it), select lower amperage. However, if you need to jump-start your vehicle, select higher amperage. In order to calculate the time of full battery charge, you should know how long does it take to charge a car battery with a 10 amp charger (in fact, from 2 hours to 16 hours depending on battery capacity), and the level of battery charge.

Plug The Charger

Now the charger should be plugged in and switched on. If timer cannot be set, or the charger is not automatic, the user should note the time. During the process of charging, the device should not be moved.


As soon as the process is over, the charger should be turned off and unplugged. The cables should be disconnected in the reverse order they were attached. First, disconnect the black clamp, then the red one. As soon as the battery is charged, you can start your vehicle.

How to charge a car battery without a charger? Jump-starter is a great alternative to this device: it can be used on-the-go. But if there’s neither of them, and the battery is not sealed, theoretically, you can try pouring acid in it (alternatively, wine or vinegar). In a few minutes, the acid will ionize its components (anhydrate and proton), which will add energy to the car. Sulfuric acid can work, as well.

Conclusion and Our Recommendation

After analyzing seven popular models of car battery chargers we can say that all of them are equally good, and the choice depends on whether you need a stationary device or a portable jump-starter. Besides, the price, the model of your car, and extra functions should be considered.

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