DBPOWER DJS50 Compact Car Battery Charger

Last updated date: August 2, 2022

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DBPOWER DJS50 Compact Car Battery Charger

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We looked at the top Car Battery Chargers and dug through the reviews from some of the most popular review sites. Through this analysis, we've determined the best Car Battery Charger you should buy.

Update as August 2, 2022:
Checkout Stay On The Road With The Best Car Battery Charger for a detailed review of all the top car battery chargers.

Overall Take

Small enough to tuck inside your glove compartment, this device will jump your battery up to 20 times. It also has a smart USB port, which you can use to charge laptops, phones, tablets, and other devices fast. The LCD screen displays remaining power.

In our analysis of 165 expert reviews, the DBPOWER Compact Car Battery Charger placed 9th when we looked at the top 17 products in the category. For the full ranking, see below.

From The Manufacturer

Perfect Journey Companion in Toolbox ATTENTION 1. Please read the instruction carefully and strictly follow the instruction before using the jump starter. Any wrong operation may cause damage to the jump starter or cannot get the car started. Don’t jump start any engine that exceed the maximum displacement the unit can bear, or it will cause damages to the unit. 3. Your jump starter will perform best when its battery is fully charged. If less than 30% charged, it may not be able to start your engine. 4. Don’t connect the positive and negative polarity together when it’s power on. Don’t crank the engine for more than 3 seconds. Allow the jump starter to cool down for at least 30 seconds after each jump-start. A must have for every car! Make sure you and your loved ones can get home when stranded. It will jump start 6.5L gas or 5.2L diesel engine up to 20 times on a single charge. Powerful LED Light & Emergency Light Besides a LED light with 3 modes (high, strobe and SOS), you can use the red emergency light as a hazard warning light to notify a traffic accident or call for emergency services. Compass & LCD Screen The compass on the surface helps you find your way home when get lost in the wild. The LCD screen shows exactly the remaining power and output voltage, which helps you make better use of the power and protect your devices. Faster & Smarter Battery Charger It equipped with a 2.1A USB Output and a 2.4A smart USB port, with 18000mAh capacity, you can charge your cellphones, tablets, kindles etc. at the fastest speed. You can also use it to charge your laptop with 8-in-1 laptop adapters (included in the package). The output voltage can be switched between 12V/16V/19V, indicated on the LCD screen.

Expert Reviews

Expert Summarized Score

17 expert reviews

User Summarized Score

5,784 user reviews

What experts liked

Measuring 3.94 x 9.53 x 4.92 inches, it's compact and perfect for your glove compartment. It's made for 6.5L gas or 5.2L diesel engines and is able to emit a charge up to 30 times on a single charge with a peak of 600 amp voltage.
- Lifewire
October 22, 2019 | Full review
PROTECTION: It offers protection over the following: Over-voltage, short circuit, over-charge, over-current and overload.
- Dotbeasts
February 8, 2019 | Full review
Incorporated into this device is an LED flashlight that can be switched between lighting, strobe, and SOS modes. There is also a red emergency light if necessary.
- Auto Guide
January 21, 2019 | Full review
This is an impressive product as it is quite compact but also has its own little case which is great for keeping it safe. It is well built and can be kept just about anywhere you like within the car.
- Battery Focus
August 30, 2019 | Full review
It is capable of providing 30 jump starts with one charge and the 18000 mAh capacity with USB port can charge all other devices like smartphones and laptops.
- The Z8
The unit features heavy-duty clamps and cables that offer an overcurrent, overload, over-voltage, over-charge, and short circuit protection. This means that the unit and battery to your vehicle are protected to allow them to give you a long service time.
- Top Best Spec
It contains a long-lasting big battery based on lithium-ion.
- Mechanic Base
A smart 2.4A USB output, 8-in-1 laptop adapter plus USB port will keep all your smartphones, tablets, laptops and other smart-devices fully charged. A well-designed LCD screen gives you instant stats on power usage
- Julie Pro
It packs 18000 mAh while still being only 1.3 pounds of weight. The maximum peak output is rated at 600 Amps and that makes this model suitable to jump start vehicles with up to 6.5L gas and 5.2L diesel engines.
- Tool Nerds
The new added LCD screen can show the exact amount of remaining power so you will never again have to guess how much charge is left
- The Gear Hunt
This device is capable of jump starting a 5.2L diesel or 6.5L gas engine to get you back on track when your car battery dies on you.
- TenBestProduct
Lots of ports and features that are clearly labeled
- Jump Starter Reviews
The unit has smart clamps that provide current protection so you cannot send too much of a current into your battery. These clamps also protect you from giving your battery too much of a charge.
- RUF Motors
Compact design – it fits each vehicle
- The Elite Product
It’s compact, lightweight and sturdy, small enough to secure right in the glovebox of the car.
- Mechanic Scout
A built-in LCD screen displays remaining power and output voltage of the switchable Smart USB port
- Car Battery Chargers Central
March 15, 2017 | Full review
The use of integrated circuits means you now have protection from reverse polarity, short circuits, open circuits, overcharging, over-current, overload, and over-voltage.
- Not Sealed
February 1, 2017 | Full review

What experts didn't like

Some online reviewers reported that its instructions weren't precise enough.
- Lifewire
October 22, 2019 | Full review
Some complaints that it's not effective on heavy-duty vehicles, battery loses efficiency over time
- Auto Guide
January 21, 2019 | Full review
Jumper cables are always active when turned on.
- Battery Focus
August 30, 2019 | Full review
Instructions aren't very clear
- The Gear Hunt
The instruction manual could be clearer
- Jump Starter Reviews
Short laptop charging cables
- The Elite Product
There have been reports the clamps are of poor quality, but this is mostly subjective and down to the opinion of the user.
- Mechanic Scout
Some reports that clamps are poor quality
- Car Battery Chargers Central
March 15, 2017 | Full review
The user manual is very basic, not detailed enough.
- Not Sealed
February 1, 2017 | Full review

Our Expert Consultant

Vicki Liston 
Home Improvement Expert

Vicki Liston writes, produces, and narrates “On The Fly…DIY,” an award-winning home improvement and DIY show of unique project tutorials for the casual DIY’er.

Home improvement and all things DIY have been Liston’s passion since she bought her first house in 2007 and she started making video blogs in 2014. She’s performed hundreds of DIY projects, from small ones to major, wall-smashing renovations and can teach you how to make a trendy DIY barn door for cheap. The proceeds earned from “On The Fly…DIY” are donated to no-kill animal shelters and rescue organizations. You can find her show on Prime Video.

An Overview On Car Battery Chargers

A car battery charger is one of those things you might not think about buying until you need it, but then you will wish you had the foresight to purchase one in advance. Choosing the right vehicle battery jumper or charger device depends on several factors unique to your situation.

The primary consideration to determine is what type of car battery charger will best suit your needs.

Vicki Liston is the writer, producer and narrator of “On The Fly…DIY,” an award-winning home improvement and DIY show of unique project tutorials for the casual DIY’er.

“There are two basic types of car battery chargers: trickle and smart (also called multi-step) chargers,” shares Liston. “I don’t consider the float chargers to be actual ‘chargers,’ as they won’t resurrect a dead battery and are only used to maintain the charge.”

Learning the pros, cons and capabilities of a car battery charger type is helpful in the decision-making process.

“Trickle chargers are the most inexpensive,” Liston says, “but they are also the slowest.”

While this might seem like a downfall, it can be an advantage in certain situations.

“If you aren’t in a major rush to recharge, a trickle unit will serve you well,” explains Liston. “It’s actually better for the battery to charge slower than faster as a fast charge can generate a lot of heat and damage the battery.”

If safety is top of mind, a smart charger might be a better choice.

“Smart or multi-step chargers employ the use of a microprocessor to assess the battery and make automatic decisions about how to charge. The standard versions have the automatic stop feature to avoid overcharging, damage, and explosions,” Liston points out. “They can also detect if you’ve accidentally connected the cables to the wrong terminals, called ‘reverse polarity protection.’ A trickle charger will ruin a battery if connected incorrectly while a smart charger just won’t begin to charge at all. Understandably, these are the more expensive option, but they are also the safest.”

Be sure to check the amp rating on a potential car battery charger, as this will let you know how quickly it will charge your battery.

“Trickle chargers are rated at below one amp so it may take a few days to fully charge a battery,”  Liston says. “Again, slower is better for the battery, but you might not have the luxury of waiting around that long and need it up and running in a hurry.

“Higher rated chargers can run around 20 amps and the emergency ‘get this thing started NOW’ type chargers can crank out 40 amps to get you on the road in a hot minute,” continues Liston. “Some smart chargers allow you to choose a recharge setting based on your circumstances. You can set it lower when you have the time to wait and it won’t expend unnecessary, damaging heat. Set it higher only when the occasion calls for speed. You’ll have the best of both worlds in one charger.”

The Car Battery Charger Buying Guide

  • If you decide on a trickle car battery charger, Liston highly recommends an advanced model to ensure the safest operation possible. “The lower end models should not be ‘attached and forgotten’ as they will not stop charging when the battery has reached maximum capacity,” advises Liston. “Because of this, they run the risk of overcharging and even causing an explosion. The higher-end models, usually referred to as advanced trickle chargers, can detect when a battery is fully charged and either stop or automatically switch over to ‘float’ mode to maintain the charge. “
  • Since you should always put safety first, the right clamps are essential. “Whether you go with a trickle or a smart charger, I highly recommend looking for a model with spark-proof clamps,” Liston notes. “Sparks can not only damage both the charger and the battery but they can cause fires so this safety feature should be a must.”
  • “If you are only looking to keep a car battery charged, opt for a 12-volt only model,” suggests Liston. “However, if you’ve got other types of battery-operated vehicles, such as an ATV, boat, jet ski, riding lawn mower, or golf cart, you might want to consider a 6/12 or a 12/24 volt charger. This will allow you to use your charger in multiple applications instead of having a different charger for each volt size. 6/12/24 chargers are commercially available however they are extremely expensive and it’s cheaper to own both a 6/12 and a 12/24 than one 6/12/24 version.”