AUXITO J503 8000A Portable Jump Starter, 20,000mAh

The AUXITO J503 portable jump starter pairs a claimed 8000A peak output with a 20,000mAh battery, LCD, USB charging and an LED light. Its stated engine compatibility and unusually high peak-current claim should be checked against your vehicle and the exact listing before relying on it.

At a glance

Listing claims 8000A peak current and compatibility with gas and diesel engines up to 12L.
20,000mAh battery is also described as a power bank with dual USB ports and a 12V-16V DC port.
LCD is described as showing battery percentage, voltage and charging status.
700-lumen LED light is claimed to offer solid, strobe and SOS modes.
Smart clamps and a Boost button are described for battery readings below 9V.

Price

$69.98Save 53%

Reference price: ~~$149.99~~

Price checked: Nov 12, 2026

View offer

Often bought together

AUXITO 8000A Portable Jump Starter for All Gas/12L Diesel, 20000mAh Car Battery Booster Jump Pack, Jump Box for Car with 60W

Pros and cons

Pros

The screen is claimed to show battery percentage, voltage and charging status at a glance.
USB and DC outputs give it uses beyond jump-starting, including charging devices and powering compatible accessories.
The built-in light has three stated modes for roadside or low-light use.

Cons

The listing gives no charging-time specification for replenishing the 20,000mAh battery.

Technical specifications

8 specifications

Identity and display
Brand	AUXITO
Model	J503
Screen technology listed	LCD

Power and battery
Battery type	Lithium Ion
Battery capacity	20000 milliamp_hours
Voltage	14.8 volts
Peak output current	8000 A

Dimensions
Dimensions listed	8.9"D x 4.25"W x 3.98"H

What to know before buying

Listing details to confirm

The title and feature copy claim 8000A peak output and support for all gas engines and up to 12L diesel, but these performance figures are manufacturer claims, not independently verified. Confirm engine compatibility and the specific current rating for your use. The 14.8-volt battery listing and the feature copy's 9V-12V battery-detection range describe different contexts and should not be treated as interchangeable voltage specifications. The listing also differs on support terms: one passage says a 3-year warranty, while another says 24 months. Confirm applicable coverage and duration before purchase.

What’s in the box

Smart clampsCheck selected pack
USB-C cableCheck selected pack
EVA caseCheck selected pack
User manualCheck selected pack

Check which accessories are included in your selected pack before buying.

Who is it for?

A good fit for

Drivers wanting a portable jump starter that also serves as a USB power bank and flashlight.
Buyers who prefer an LCD readout for battery percentage and voltage during use.
Users seeking a compact emergency kit for a vehicle, provided they confirm that the claimed engine compatibility suits their vehicle.

Less suited to

Buyers who need independently established jump-start performance or confirmed compatibility for a particular engine.
Shoppers who require clear, consistent warranty terms without checking the selected listing.

AUXITO J503 8000A Portable Jump Starter, 20,000mAh · photo 2 — Additional product photo 2

Frequently asked questions

What engine sizes does the listing claim this jump starter supports?

The title and feature copy claim use with all gas engines and diesel engines up to 12L. Treat this as a listing claim and confirm compatibility with your vehicle before relying on it.

Can it charge devices as well as jump-start a vehicle?

The listing describes a 20,000mAh power bank, dual USB ports and a 12V-16V DC port. It does not specify charging times for the internal battery.

What does the LCD display show?

The feature description says it shows battery percentage, voltage, charging status and connection feedback.

What comes in the kit?

The feature copy names the jump starter, smart clamps, USB-C cable, EVA case and user manual. This is a claimed kit list, so confirm the contents in the selected listing.