GOOLOO GT4000S Review: Big Jump Power + Fast 100W Charging
Best for drivers who want maximum jump-start confidence in a compact kit—less ideal if you want the smallest, simplest, budget-only pack.
- Best for: SUVs/trucks households who want reliable emergency starts.
- Highlights: 100W Type-C fast charging + clear 3.2″ status screen.
- Trade-offs: clamps/cables are bulky; not the cheapest option.
A portable jump starter is one of those “hope I never need it” tools—until the day your battery is dead, it’s cold outside, and you’re stuck. I’ve used a handful over the years, and the GOOLOO GT4000S stands out for one simple reason: it’s shockingly powerful for its size, and it doesn’t feel like a fussy gadget when you’re stressed and trying to get moving again.
I tested it the way most people will use it: kept it in the car, pulled it out when a battery was weak/dead, and used it as a power bank in between. I also paid attention to the stuff that annoys you over time—cable bulk, screen clarity, button logic, and whether it actually feels “ready” when you need it.
It’s not perfect (I’ll get into the trade-offs), but if you want a compact, high-output jump starter with legitimately useful fast charging, the GT4000S is a strong buy.
Quick Verdict
Verdict: The GOOLOO GT4000S is best for drivers who want maximum jump-start confidence in a compact kit, but it’s not ideal if you want ultra-simple controls, smaller clamps, or a lighter/cheaper emergency-only option.
Best for:
- People who want a powerful jump starter that can handle bigger gas engines and many diesel applications
- Anyone who values fast recharging + fast device charging (Type-C up to 100W)
- Households with multiple vehicles (one tool that can help everyone)
Not ideal for:
- Buyers who only want a basic, budget jump pack for small cars
- Anyone who hates bulky cables/clamps in the case
- People who want a super minimal interface (no learning curve at all)
Biggest real-world benefit: It feels like you’re carrying “way more jump starter” than its size suggests—it starts dead batteries quickly and repeatedly when it’s adequately charged.
Main trade-off: The kit is compact, but the clamps/cables are still chunky, and the overall user experience isn’t the simplest I’ve seen.
At a Glance
- Category: Portable lithium jump starter + power bank
- Price range: Mid to upper-mid (varies)
- Key feature: 100W two-way fast charging (Type-C) + high peak output (4000A claim)
- Best use case: Emergency jump starts + fast charging for phones/laptops on the go
Test conditions (real-world):
- Kept in vehicle for daily driving and errands
- Used for jump-starting and general power-bank charging
- Focused on practical usability: setup time, clamp handling, display readability, and repeat starts
What Is the GOOLOO GT4000S?
The GT4000S is a portable lithium jump starter designed to start 12V vehicles (cars, SUVs, trucks, etc.) and also function as a high-output power bank. The headline features are:
- High peak jump output (marketed at 4000A)
- Support for large gasoline engines and many diesel engines
- A 3.2-inch display for status and battery percentage
- 100W fast charging for the unit itself and for devices (Type-C)
- Built-in safety protections and a multi-mode flashlight
In plain English: it’s trying to be a “serious” jump starter that doesn’t take up half your trunk, and it adds modern fast charging so it’s useful even when you’re not jump-starting anything.
Real-World Performance
Jump-starting: the reason you buy it
This is the part that impressed me most. The GT4000S consistently felt ready to do the job—especially when the battery was clearly weak or flat. The start process was straightforward:
- Plug in the jump cable pack
- Clamp red to positive, black to negative/ground
- Confirm it’s ready, then start the vehicle
What surprised me wasn’t just that it worked—it’s that it did multiple successful starts without feeling like it was on its last breath. Some smaller jump packs will start a car once and then act like they need a nap. With the GT4000S, as long as it’s charged, it feels more like a tool than a “maybe.”
Speed and confidence (under stress)
When you’re dealing with a dead battery, you don’t want unclear lights or confusing beeps. The screen is genuinely helpful because it tells you what’s going on at a glance—battery percentage and status icons are easier than guessing what a blinking LED means.
As a power bank: actually useful
A lot of jump starters advertise “power bank” features that feel like an afterthought. Here, the 100W Type-C angle matters. If you travel with a laptop (or even just want faster phone charging), the GT4000S is much more practical than older 18W/30W-style packs.
I also like that it’s useful in normal life—charging devices, topping up accessories—so it’s not just sitting there waiting for an emergency.
Build Quality & Durability
The unit feels rugged: thick casing, protective corners, and a design that looks like it’s meant to live in a trunk. The clamps are sturdy and confidence-inspiring—they don’t feel like flimsy plastic.
That said, rugged doesn’t automatically mean “small.” The clamps and cable set are bulky, and that impacts how nice the kit is to store and handle.
If you’re expecting something that fits neatly in a glove box, this isn’t that. It’s compact for the power class, but it’s still a real jump starter kit.
Ease of Use & Setup
Setup time
Once you’ve done it once, the process is fast—typically seconds from opening the bag to being ready. The cable connector is secure, and the clamps open wide enough to bite confidently.
Learning curve
It’s mostly easy, but there are two minor usability points:
- You’ll want to familiarize yourself with the icons the first time (especially if you’re using it under pressure later).
- Like many jump packs, there may be situations where you need to use or understand the boost/override concept for truly dead batteries (common across brands). It’s not hard—just not “zero thinking required.”
Small annoyances
- The cables don’t pack down tiny, so you may have to be deliberate when re-stowing everything.
- The case/bag organization is “fine,” but not the most elegant I’ve used.
Who This Product Is For
You should seriously consider the GT4000S if:
- You drive a larger gas vehicle (SUV/truck) or want coverage across multiple vehicles
- You want a jump starter that doubles as a high-quality fast charger for devices
- You prefer a clear display over mystery LEDs
- You like the idea of charging it quickly and not babysitting it all day
In short: it’s a great fit for someone who wants capability and convenience, not just the cheapest emergency box.
Who Should Skip This Product
Skip it (or consider a smaller class) if:
- You only need occasional help for a small sedan and want the cheapest workable option
- You strongly prefer ultra-compact kits (especially clamp/cable size)
- You don’t care about 100W charging and would rather save money
Also, if you’re the type who never checks/maintains emergency gear, you might be better served by something simpler—even if it’s less capable.
Pros & Cons
Pros:
- Impressive jump-start capability for the size (high confidence tool)
- Clear, useful screen that reduces guesswork
- 100W fast charging makes it genuinely useful beyond emergencies
- Sturdy clamps and solid build that feel dependable
- Good “household tool” value if you have multiple vehicles
Cons:
- Bulky clamps/cables relative to ultra-compact jump packs
- Interface isn’t the simplest on the market (icons/boost concepts worth learning once)
- It’s not the cheapest option—overkill if you only need small-car coverage
- Like all lithium jump starters, it still needs basic maintenance habits (don’t neglect it for years)
Comparison to Alternatives
Instead of getting lost in spec wars, here’s the practical positioning:
- Versus smaller/budget jump starters: The GT4000S feels more “serious” and confidence-inspiring, especially when the battery is truly dead. Budget packs can work, but they often feel less consistent and recharge more slowly.
- Versus premium mainstream brands (e.g., NOCO-style compact jump packs): Premium units often win on polish and simplicity, but you may pay more for the brand experience. The GT4000S competes by offering strong capability plus the 100W fast-charge angle, which is genuinely valuable if you carry modern devices.
- Versus high-capacity “brick” jump starters: Larger units may give you more reserve, but they’re less convenient to keep in the car daily. The GT4000S strikes a nicer balance if you want something you’ll actually bring along.
FAQ
Can the GT4000S start a completely dead battery?
In my use, yes—when it’s charged, it can start vehicles with very weak/dead batteries quickly. For extreme cases, you may need the boost/override behavior common to many jump starters.
How fast does it recharge?
Fast charging is one of its best features. With the right charger/cable, it’s designed to recharge much quicker than older jump packs.
Is it hard to use for beginners?
Not hard, but I recommend doing a quick “practice run” at home so you recognize the icons and know where everything goes.
Can it charge a laptop?
It’s designed to support high-watt charging through Type-C (up to 100W), which is a big advantage over basic jump starters.
Are the clamps safe and sturdy?
They feel solid and secure. Built-in protections are intended to reduce risk from missteps, but you still need to follow standard jump-start safety.
Does the flashlight matter?
It’s more useful than you’d think—jump-start problems love to happen at night or in bad weather.
Final Verdict – Should You Buy It?
Score: 8.8 / 10
If you want a jump starter that feels seriously capable, stores easily, and doubles as a modern fast charger, the GOOLOO GT4000S is an easy recommendation. The biggest reasons I’d buy it are the confidence during jump starts, the clear display, and the 100W charging that makes it useful even when nothing is wrong.
The main reasons to skip are simple: if you want something cheaper, smaller, or simpler, you can find alternatives—but you’ll usually give up capability, fast charging, or both.
Best for: drivers who want high confidence coverage and fast charging in one kit.
Skip if: you only need basic small-car backup and want the smallest/cheapest option.
| Preview | Product | Price | |
|---|---|---|---|
|
GOOLOO GT4000S Jump Starter 4000A Car Jumper Starter (Up to 10L Diesel All Gas Engines), 100W… |
$149.99 |
View on Amazon |
