DBPOWER DJS90 3000A Portable Car Jump Starter

The DBPOWER DJS90 is a portable lithium-ion jump starter listed with a 3000A peak current and a 18000mAh capacity. It also claims USB device charging, an LCD charge display, a compass and an LED light, combining roadside starting support with a compact backup power bank.

At a glance

The manufacturer claims up to 30 starts per charge and suitability for engines up to 8.0L gas or 6.0L diesel. Actual results depend on conditions and the vehicle.
A USB output is intended for charging phones, tablets and other devices. The LCD is claimed to show remaining power.
The listing describes clamp protections against overcurrent, short circuit, overload, overvoltage and overcharging.
A compass and LED light add basic navigation and illumination features for roadside or travel use.

Price

$47.49Save 41%

Reference price: ~~$79.99~~

Price checked: Nov 13, 2026

View offer

Pros and cons

Pros

Jump-starting and USB device charging in one compact unit.
LCD charge indication and a claimed carrying case can help with storage and checking charge status.
The stated compatible vehicle types include cars, motorcycles, lawn mowers, RVs, tractors and vans.

Technical specifications

18 specifications

Identity
Brand	DBPOWER
Model	DJS90

Starting and compatibility
Peak current	3000 A
Starting voltage	12 volts
Listed engine compatibility	Up to 8.0L Gas/6.0L Diesel Engines
Listed vehicle types	Lawn Mower, Motorcycle, Passenger Car, RV, Tractor, Van

Power and battery
Battery type	Lithium Ion
Battery capacity	18000 milliamp_hours
Battery energy	66.6Wh
USB output	USB 5V/2.4A
USB-C input	Type-C 5V/3A

Display and features
Screen technology listed	LCD
LED light	Yes
Compass	Included

Dimensions and operation
Weight listed	1.1 pounds
Dimensions listed	7.28 x 1.57 x 3.54 inches
Operating temperature	-20°~60°(-4°F~140°F)
Claimed full charge time	Within 5 Hours

What to know before buying

The listing advises a 3–5 minute cool-down between starting attempts, an initial full charge, and recharging every 3 months when unused. It also says to connect the clamps to the jump starter before use.
The claimed engine-size compatibility and up-to-30-start figure are manufacturer statements, not guarantees for every vehicle or battery condition.

Listing details to confirm

Listing details are inconsistent or unconfirmed: the product title and feature copy identify 3000A, while the item type name says 600A. Weight is listed as both 1.1 pounds and 1.33 lbs, and the package's explicit components field gives only “1” while feature text claims clamps, cable, guides and a carry case. Confirm the selected listing and kit contents before purchase.

What’s in the box

Jump starterIncluded
Jumper clampsCheck selected pack
USB charging cableCheck selected pack
User guide and manualCheck selected pack
Carry caseCheck selected pack

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

Who is it for?

A good fit for

Drivers wanting a compact jump starter and USB backup charger for car storage or travel.
Owners of listed vehicle types whose engine falls within the stated gas or diesel compatibility limit.
Buyers who value an LCD charge indication, compass and light in a roadside power pack.

Less suited to

Buyers who need confirmed kit accessories without verifying which selected listing package is supplied.
People seeking a capacity or durability assurance beyond the manufacturer's claims and reported customer experiences.

DBPOWER DJS90 3000A Portable Car Jump Starter · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 18,673 ratings

5 stars75%75%
4 stars15%15%
3 stars3%3%
2 stars2%2%
1 star5%5%

Customer feedback highlights portability, ease of use, perceived power, versatility and the carrying case. Some customers say the battery holds its charge for a long time, while others report charging or durability problems. Those mixed experiences matter for a device intended to sit in a vehicle for emergencies, so its listed capacity and starting claims should not replace periodic charging and checks before travel.

Positive themes

Customer feedback describes the unit as compact and portable, with some finding it easier to use than jumper cables.
Customers also mention its usefulness as a phone charger and appreciate the carrying case.

Mixed feedback

Battery life reports vary, from holding a charge for a long time to failing to take a charge.
Durability reports are mixed, with some customers describing early failure.

Frequently asked questions

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

It claims compatibility with engines up to 8.0L gas or 6.0L diesel. This is a manufacturer-listed limit, not a guarantee for every vehicle or battery condition.

Can it charge a phone?

The listing describes a USB output for charging phones, tablets and other devices, with a specified output of USB 5V/2.4A.

What comes in the package?

The feature copy claims clamps, a USB charging cable, guides and a carry case, but the explicit included-components field only says “1.” Confirm the selected listing's kit before ordering.

How should it be maintained between uses?

The listing recommends charging fully on first receipt and recharging every 3 months when unused. It also advises a 3–5 minute cool-down between starting attempts.