Review: Imazing 20,000mAh 2500A Peak Portable Jump-Starter Power Bank

Imazing 20,000mAh 2500A Peak Portable Jump-Starter Power Bank









  • Higher power capacity than Imazing's other model, and it has a 2500A Peak current that can jump-start your car faster
  • Comes with jump-starter cable adapter, USB-C to USB-A cable and a hard carrying case
  • Uses a digital display to show remaining power capacity, and output / input status


  • The USB-C port does not feature Power Delivery
(Last Updated On: August 11, 2021)


We’ve already done a review for another one of Imazing’s portable jump-starter power banks, which was the 18,000mAh 2000A Peak current jump-starter. That one was incredible with power output and charging features. This Imazing power bank is an upgrade from their other one because it has a 20,000mAh power capacity and a 2500A peak current.

So you get more power capacity and jump-starting power, but is that worth the higher price tag? Let’s take a closer look to see what other features this Imazing power bank has.


Power Capacity:

This Imazing power bank does a bit of an upgrade with a 20,000mAh power capacity on the power capacity side. In terms of how many times you can use this power bank to jump-start your car, you’re going to fair about 30 times for most jump-starting situations. However, it depends on how long you crank for and how high the load is when you crank your car; that said, cranks shouldn’t be that long, and the longer you crank, the more power is used.

If we’re talking about charging smartphones or tablets with this power bank, then you’re going to get about two or three full charges for most phones on the market. Tablets will get to their full power about one time as they have much larger batteries that can span into 10,000mAh battery sizes.

Overall, a 20,000mAh power capacity is definitely the way to go considering that this is a portable jump-starter that you’re going to want to keep in your car and use in an emergency. Running out of power when you can’t get home with a small power capacity would not be ideal—The higher the capacity for portable jump-starters, the better.

Output Charging:

Okay, so the charging and using the jump-starting feature from this power bank remains the same on this Imazing jump-stater from our review on the 18,000mAh unit. This one also using a USB-C port, two USB-A ports, and one DC port. The USB-C port does not feature Power Delivery and only has a 15W charging speed. One USB-A port has Quick Charge 3.0, but the other one has a standard 5V/2.1A charge rate.

The DC port on this power bank is mainly used if you use the included DC adapter that you can find in the box. The DC port has a 12V/16V|10A power output that you can use to power certain compatible appliances.

The jump-starting for this Imazing power bank is a bit more powerful than the previous model because it has a 2000-2500A peak current and a 1000A starting current. This means that you’ll have a better chance of jump-starting your car more easily, depending on how drained the battery is.

Input Charging:

The only way to recharge this power bank is via the USB-C port, and the power bank comes with a USB-C to USB-A cable that you can use to recharge it. However, a wall charger is not included in the box, but we recommend that you get an 18W USB-C wall charger or greater to recharge this power bank at its max charging speed. The max recharging rate is 15W, but it’s best to get an 18W USB-C PD wall charger as they’re easily available.


Size and Weight:

The sizes of this power bank can best be described as hefty, as it has so many features to use, and you have to account for the jump-starting capability that no doubt makes this power bank larger. The charger has a length of 7.8 inches, a width of 3.6 inches, and a thickness of 1.6 inches. The charger weighs 2.6 pounds.

So this isn’t really the type of power bank you’re going to keep on you, as it will be rather difficult to fit inside a pocket. It’s best to keep this power bank in your car in case you need to use it.

Functional Components:

Using the power bank is simple as it automatically turns on when you plug a device in. The two USB-A ports, LED flashlight and jump-starter ports, are found on a single side, while the USB-C port and DC port are found on another side.

On top of the power bank is where you’ll find the power button and a digital display that shows the remaining power capacity and if you’re using an output or input. To turn on on the flashlight, you have to hold the power button down.

To jump-start, your car, included in the box, is a jumper cable adapter, and you plug the adapter into the power bank, then connect the adapter clamps onto your battery. Once connected to your battery, you can then crank your car and start it.


Structure and Material:

The charger has a great build, and you won’t have to worry about it breaking as long as you’re not exposing it to water or dropping it from a high height. When storing the power bank in your car, it’s best to place it in the hard case that comes included with the power bank.


The one precaution you should take when using this Imazing power bank is when it comes it jump-starting your car; do not crank your car too many times when trying to jump-start. This can lead to overheating of the power bank and may end up expanding the batteries inside the power bank, which can permanently damage the unit.


If you’re looking for a powerful portable jump-starter that can start most vehicles, then this Imazing 2500A peak current portable charger is a great choice. To keep this jump-starter as reliable as possible, it’s best to keep it in your car where you’re going to need it most if you ever need to jump-start your car.



Charging power is pretty good with the power bank featuring one 15W USB-C port, two USB-A ports with one using Quick Charge, and a DC port. The jump-starting is very powerful as it provides a 2500A Peak current that has a better chance of jump-starting your car battery faster.


The power bank is quite large and heavy. Basically, it’s not the type of portable charger you’d carry on you for a long duration. Instead, it’s best to keep this power bank in your car and the hard case that it came with.


Just be careful about not cranking your car too many times, and be sure to let it cool down between cranks.


The power bank has many charging ports and is powerful enough to jump-start most cars.

Imazing 20,000mAh 2500A Peak Portable Jump-Starter Power Bank Specs
Power Capacity20,000mAh
USB-C Port5V/3.0A (15W)
USB-A Port 15V/3.0A | 9V/2.0A | 12V/1.5A
USB-A Port 25V/2.1A
DC Port12/16V|10A
Start Current1000A
Peak Current2000A - 2500A
Size7.8 x 3.6 x 1.6 inches
Weight2.6 Pounds


If you’re looking for a more powerful portable jump-starter and a bit of a higher power capacity, this Imazing 2500A Peak current jump-starter is one of the best that you can get. It may be worth it over Imazing’s 2000A Peak current model if you’re looking for more power.

Imazing Portable Car Jump Starter - 2500A Peak 20000mAH (Up to 8L Gas or 8L Diesel Engine) 12V Auto Battery Booster Portable Power Pack with Jumper Cables, QC 3.0 and LED Light
  • Imazing CAR JUMP STARTER: The powerful jump starter with 2500A Peak Current can jump start your vehicle (Up to 8L Gas or 8L Diesel Engine). Work with cars, motorcycles, ATVs, UTVs, lawn mowers, snowmobiles, etc.
  • ADVANCED PROTECTION TECHNOLOGY: The Intelligent Clamp features 8 advanced safety technologies, provides ultimate protection for your safety.
  • HIGH-SPEED CHARGING PORTS: Dual USB output ports can fully charge your smartphone, tablet, camera and other compatible electronic devices. The quick-charge 3.0 port provides the fastest charging speed to save your time.
  • MULTIFUNCTIONAL LED FLASHLIGHT: Imazing jump starter has a built-in LED flashlight with 3 modes: Flashlight, SOS, Strobe. It's perfect for camping, outdoors, picnic, emergencies, travel, etc.
  • WHAT YOU GET: 1 x Jump starter, 1 x Clamp Cable, 1 x Type C cable/Charging the Imazing jump starter, 1 x Cigarette Lighter Adapter, 1 x User Manual, 1 x Carry case and 2 years warranty service. Imazing offers working days live chat on FB page, search “Imazing” on FB if you have any problems for shopping.
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