A car jump starter battery is a power bank, i.e. a powerful battery that acts as a jump-start booster. If you want to buy such a device, you should first understand the basic functionality and, above all, know how much power the device should at least have for your vehicle. Only then can you decide whether a certain model or an expensive or cheaper car jump-start battery makes sense for your purposes.

Finally, you will find an overview of the best car jump-start batteries that we determined in our test on our list of the best.

What Are the Best car Jump Starter Batteries in 2020?

DBPOWER Portable Car Jump Starter DJS50

The DJS50 model shines with a capacity of 18,000 mAh and a peak current of 600 amperes. At the same time, at 18.5 x 8.8 x 3.5 centimeters, it is still quite compact and easy to stow away.

It can be fully charged in around 5 hours and can start gasoline engines up to a displacement of 6.5 liters or diesel engines up to around 5.2 liters.
In addition, it offers an LED light that can be set to three different modes (including SOS), as well as a red emergency light that can be used as a warning light in the event of an accident.

The LCD display provides information about the charge level and also offers a digital compass to identify the direction.
This can also be helpful in an emergency.

Overall, it is very solidly made, offers two USB ports and an additional 5V / 2.4 A output socket as well as extensive protection against overvoltage, polarity reversal, and overcharging, so that it is highly recommended overall, even if its price is in the upper mid-range

Nekteck Car Jump Starter Portable Power Bank External Battery Charger

This model from Nekteck prevailed as the best car jump-start battery. It offers a peak current of 500 amps with a capacity of 12,000 mAh.

In addition to the alligator clips included in the scope of delivery, it also offers two USB ports for charging portable devices and is also well protected overall, so you don’t have to worry about incorrect polarity, overvoltage, or overheating.

According to the manufacturer, it can be used for gasoline engines with a displacement of up to 3 liters or for diesel engines up to 2.5 liters with 12V. Basically, the capacity is sufficient for up to 15 stars, but at very cold temperatures the specified engines reach their limits here and there.

The short charging time of only around 3 hours and the integrated LED flashlight was particularly positive. The device is also convincing in terms of design because with a size of 24 x 12.5 x 10 cm it is very compact overall. In terms of price, it is in the mid-range, so that overall a very good price-performance ratio results when you consider the robust and at the same time compact design.

DBPOWER 1000A Portable Car Jump Starter

The 14.6 x 9.2 x 3.5 cm device from DB offers a capacity of 1000 Amps. This means that it is one of the somewhat weaker devices on the market, but it is also correspondingly compact and inexpensive.

In addition to a charging indicator and an integrated LED flashlight, it also offers a USB output for charging other end devices and, of course, the jump starter cables are included in the scope of delivery.

The manufacturer states that gasoline engines with a displacement of up to 2.5 liters can be started up to 15 times, but this is a bit over the top. In practice, it is a little less and at low temperatures, it gets quite tight with a 2.5-liter engine.

However, if you are looking for an inexpensive jump-start device that is solidly made, can be charged quickly, and is also extensively protected (overvoltage, overcharging, short circuit, overheating), you will be very satisfied with the device from DB POWER because the price-performance Relationship is very good.

General information

In contrast to conventional chargers or jumper cables, you do not need another vehicle to jump-start a car, nor do you have to wait until the battery is charged. If the battery is adapted to the performance of your motor, the starting process should work immediately.

The nominal voltage of the car battery must always match the nominal voltage of the device (usually 12 volts), this is very important. The ignition must also be switched off when you connect the battery. As soon as the battery has been connected, you can start the vehicle immediately.

However, at very low temperatures it can happen that the starting process does not work immediately. This is especially true for very cheap start-up boosters because they often fail at very low temperatures. Just as a discharged car battery can freeze at 0 ° C, a battery can also fail at low temperatures. All devices in the test had no problems at normal room temperatures.

However, if you get stuck somewhere in winter and the battery discharges, you could be doomed to fail at low temperatures. However, it could partially help to warm up the device somehow. This improves the performance and it can be started again if necessary.

It is therefore important to consider the performance of the auto jump starter before purchasing a device, as each engine requires a different peak load to start. The displacement is predominantly decisive for the minimum peak load. The higher the load required, the more powerful the starter device’s battery must be.

Which jump-start battery for which engine?

Depending on the engine and performance, you will need a suitable jump-start device. So that you do not buy a device that is not suitable for your engine, the following is a brief summary of the respective minimum power in amperes that you need for your engine. We use the number of cylinders as a guideline because this is relatively easy to remember.

However, once you have made a decision, you should also ensure that the battery jump starter can provide sufficiently high performance for your cubic capacity. Please note that a diesel engine always requires significantly more power than a gasoline engine.

Petrol engines guide value:

Motorization minimum power jump start

4-cylinder gasoline engine 150 to 200 amps

6-cylinder gasoline engine 200 to 250 amps

8-cylinder petrol engine 250 to 300 amps

Diesel engines guide value :

Engine minimum power jump start

4-cylinder diesel 300 to 400 amps

6-cylinder diesel 400 to 500 amps

8-cylinder diesel 600 to 700 amps

For the starting process at very low temperatures from 0 ° C and below, you should double the minimum power to be on the safe side!

Unfortunately, the manufacturers hardly provide any information about the required peak performance. Therefore it is difficult to determine exact minimum values. It is therefore always advisable to buy a device that offers the highest possible peak performance.

Additional equipment

When making a price comparison, it is worth paying attention not only to performance but also to solid workmanship and additional features. Many manufacturers also offer an LED flashlight built into the device, which can be very helpful if you have to use the device to start it up at night. In addition, you should always make sure that protective mechanisms against short circuits, overcharging, overvoltage, and overheating are in place. The former mechanism is particularly important if you accidentally connect the device incorrectly.

In addition to the pure start function, many boosters also offer an integrated LED flashlight. This is very useful if you can charge an empty battery in the dark and is a highly recommended additional function. In addition, you should always make sure that there is a protective mechanism against short-circuit in case you have connected something incorrectly. It also increases the service life of the charger. If you choose a device that also has USB ports installed, you can also use it as a charger for various electronic devices. However, you have to keep in mind that charging a tablet or modern smartphone requires a lot of power. Therefore you should always check the charge level of the battery charger,

Many manufacturers have also integrated USB ports or adapters for charging other devices in their power banks. As a result, you can not only use the model to jump-start but also charge electronic devices such as cell phones, tablets, laptops, or DVD players while driving. But be careful: Charging a tablet or laptop requires a lot of power so that a mid-range device itself can be empty after charging the laptop and must also be recharged. If you then need help getting started, you have a problem.