Name: AVAPOW TJ18 Portable 12V Car Jump Starter — 5000A Peak
Brand: AVAPOW
Rating: 4.9 (12 reviews)

Product review

High-power jump capability: The TJ18 delivers up to 5000A peak current to restart depleted 12V batteries, including engines up to 8.0L gasoline or diesel. On a single full charge it can deliver more than 40 starts under normal conditions, making it suitable for cars, trucks, ATVs, motorcycles, lawn mowers, tractors, snowmobiles, and boats.

4-inch HD status screen: A bright 4" high-definition display reports battery level, readiness to start, and error alerts in real time, including reverse-polarity warnings and a green "ready" indicator. The clear readout reduces guesswork when preparing to jump a vehicle in varied lighting.

Built-in safety systems: The unit’s Battery Management System (BMS) provides 12 layers of protection against overcurrent, short circuit, reverse polarity, spark generation, and other faults. The included smart jumper cables have reinforced, all-metal clamps and rugged insulation to withstand repeated use.

Multiple outputs and versatility: Beyond jump-starting, the TJ18 functions as a high-capacity power bank. Outputs include multi-protocol USB-A (5V/3A, 9V/2A, 12V/1.5A), a USB-C port with up to 18W input/output, an EC5 port, and a 12V/10A DC socket with dust covers to power phones, tablets, inflators, car vacuums, and various 12V accessories.

Emergency lighting: An integrated LED flashlight offers three modes — steady, strobe, and SOS — to assist with nighttime breakdowns, camping, or emergency signaling.

What’s in the box: The package contains the AVAPOW TJ18 portable jump starter, smart jumper cables with clamps, a USB-C charging cable, a cigarette-lighter charging adapter, a rigid storage case, a user manual, and 24 months of technical support.

Design and portability: The TJ18 is engineered to be compact and lightweight so it fits in a glovebox, trunk, or carry bag without taking much space. The rugged housing and fitted case protect the unit against bumps during transport.

Usage tips: Fully charge the unit before first use or after extended storage to ensure peak performance. After a successful jump, wait roughly 10–15 minutes before attempting another start to avoid heat buildup. Maintain the battery by recharging every two to three months when not in regular use.

Pros

High peak current for large engines
Clear 4" display with status and alerts
Multiple output ports including USB-C

Cons

May be heavier than ultra-compact models
Not intended as a professional garage unit
Some users report mixed success with very large diesels

VerdictA versatile roadside companion that combines high peak current for large engines, clear on-device status via a 4" display, and comprehensive safety features. Practical for drivers who want a compact jump starter that also doubles as a power bank and emergency light.

Reviews

Juan Tijerina 5/5

Small but powerful

Used it a couple of times straight away and it performed flawlessly. Compact and effective.
matt23 5/5

Responsive support and a reliable unit

Had an early hiccup but the support team fixed it quickly. I already own three of these and keep returning to this model because service and performance have been solid.
Tabitha 5/5

Worth the purchase!

Charged it up and it started my car right away. The forced-start feature works well. Very pleased with how dependable it is.
dusty 5/5

Jumped my diesel with no trouble

Out of the box it was half charged but still brought my 2013 6.7 Cummins back to life without issues. I was impressed.
Ken Harrison 5/5

Failed to start my 7.3 diesel

Bought this for my Ford 7.3 but it would not crank the engine despite being fully charged. Very disappointed.
ButchandtheKid 5/5

High-quality construction

Connected to a dead battery and the engine was running in seconds. The packaging and carry case are well done — this feels like a premium unit.
Marc Allen 4/5

Handy to keep in the car

I keep it topped up and stashed in my vehicle for late drives on dark country roads. Gives me peace of mind.
Juan Manuel 5/5

Got me out of a bind on a trip

Used it once to avoid calling a tow. Pulled it from the case, clipped on, and the car started. Also doubled as a power bank when we needed to charge phones while traveling.
Seb 5/5

Sturdy and effective

Well packaged and feels robust. Plastic casing is light yet solid; clamps grip well. The LED is bright and the display is clear. Also charges devices quickly.
Sprocket 5/5

Powerful and compact booster

Compact lithium design but packs a serious punch. Has started weak and dead batteries reliably and rivals pricier units I’ve used at work.
V. S. 5/5

Reliable starter with clear feedback

A dependable jump starter that comes in a complete kit with a sturdy bag and smart clamps. The large display and safety features make it easy to use and reassuring to carry.
Just Jess 5/5

A versatile multi-tool for your trunk

Solid, well-built device with strong clamps and a reassuring weight. The screen is informative and the padded carry case is convenient. USB-C charging is a welcome modern touch.