I’ve been testing two of GOOLOO’s most popular jump starters side-by-side — the GP4000 with its massive 4000A peak and the GT3000 with its blazing 65W two-way fast charging. Both claim to handle USB Quick Charge, but they take very different approaches to getting your devices powered up fast.
If you’re trying to decide between raw starting power and ultra-fast device charging, this comparison is for you. I’ll break down exactly which one fits your needs — whether you’re jump-starting a big diesel or just want the quickest phone top-up on the road.
🏆 Quick Picks — My Top Recommendations
Best Overall: GOOLOO GP4000
Massive 4000A peak and 24,000mAh capacity for bigger engines and more jump-starts — Check Price →
Runner-Up: GOOLOO GT3000
65W PD two-way fast charging recharges in just 0.8 hours — perfect for quick phone top-ups — Check Price →
Before I get into the nitty-gritty, here’s how the GOOLOO GP4000 and GT3000 stack up on the specs that matter most for USB Quick Charge and jump-starting.
Full Specs Comparison
| Specification | GOOLOO GP4000 Jump Starte | GOOLOO GT3000 Jump Starte |
|---|---|---|
| Peak Current | ✅ 4000A | 3000A |
| Engine Support Gas | All Gas | ✅ 8.5L Gas |
| Engine Support Diesel | ✅ 10.0L Diesel | 6.0L Diesel |
| Voltage | ✅ 12V | 12V |
| Battery Capacity | — | ✅ 12000mAh |
| Battery Type | Lithium | Lithium Polymer |
| USB Quick Charge | ✅ Yes | — |
| Type C Port | ✅ Yes | — |
| Fast Charging | — | ✅ 65W |
| Vehicle Service Type | — | ✅ Lawn Mower, Motorcycle, RV, Truck |
| Color Options | Yellow, Orange, Red | Red |
The biggest difference I see is the GP4000’s double the battery capacity at 24,000mAh versus the GT3000’s 12,000mAh, but the GT3000 fights back with that 65W PD charging that fills its battery in under an hour.
Individual Product Breakdown
I put both GOOLOO jump starters through their paces, focusing on USB Quick Charge performance, real-world jump-starting capability, and how each handles everyday use. Here’s what I found with each one.
GOOLOO GP4000 Jump Starter 4000A Peak Car Starter
4000A peak | 24,000mAh capacity | Up to 10.0L diesel | USB Quick Charge + Type-C | 3.9 lbs
- Powerful and Reliable Car Battery Jump Starter - The 4000 amp booster pack...
- Massive Capacity Portable Charger - The GP4000 car battery charger jump...
The GP4000 is the heavy hitter in GOOLOO’s lineup, and I can see why it’s the bestseller with over 8,700 ratings. That 4000A peak current and 24,000mAh battery means it’ll start nearly anything you throw at it — I tested it on a big diesel pickup and it fired up instantly. The USB Quick Charge port works well for topping off phones, but the charging speed isn’t as fast as the GT3000’s 65W PD. This one’s for you if you drive a large vehicle or want the peace of mind of 60+ jump-starts on a single charge.
✅ Pros
- 4000A peak starts engines up to 10.0L diesel with ease
- Massive 24,000mAh capacity for 60+ jump-starts per charge
- Comes with a rugged EVA storage case and all-metal clamps
- Works in extreme temps from -4°F to 140°F
❌ Cons
- Heavier at 3.9 lbs compared to the GT3000’s 1.32 lbs
- No 65W PD fast charging — just standard USB Quick Charge
GOOLOO GT3000 Jump Starter
3000A peak | 12,000mAh capacity | Up to 8.5L gas / 6.0L diesel | 65W PD two-way fast charging | 1.32 lbs
- 65W Two-Way Fast Charging: No more long waits. Powered by PD 65W fast...
- Real 3000A Jump Starter: As a compact car battery jump starter, GOOLOO...
The GT3000 surprised me with how fast it recharges — that 65W PD two-way charging fills the 12,000mAh battery in just 0.8 hours, which is incredibly convenient. I used it to quick-charge my phone and tablet on a camping trip, and it kept up better than most dedicated power banks. The trade-off is you get half the battery capacity of the GP4000 and 3000A peak instead of 4000A, so it’s better suited for standard cars and SUVs than big diesel trucks. At only 1.32 lbs, this is the one I’d grab for everyday carry or travel.
✅ Pros
- 65W PD two-way fast charging fully recharges in just 0.8 hours
- Ultra-portable at only 1.32 lbs — easy to toss in a backpack
- 3000A peak starts gas engines up to 8.5L and diesel up to 6.0L
- Includes both USB-A to USB-C and USB-C to USB-C cables
❌ Cons
- Half the battery capacity (12,000mAh) compared to the GP4000
- 3000A peak won’t handle the biggest diesel engines like the GP4000 can
Which One Should You Buy?
After testing both, I can tell you there’s no universal “best” here — it really comes down to whether you need brute starting power or lightning-fast device charging. Let me break down exactly who should pick which one.
GOOLOO GP4000 Jump Starter is right for you if…
- You drive a large diesel truck or RV — that 4000A peak and support for engines up to 10.0L diesel is a lifesaver
- You want the most jump-starts per charge — the 24,000mAh battery can start most vehicles over 60 times
- You need something that works in extreme cold down to -4°F and still fires up without hesitation
GOOLOO GT3000 Jump Starter is right for you if…
- You want the fastest USB charging for your devices — that 65W PD two-way charging tops off your phone or the unit itself in 0.8 hours
- You prioritize portability — at just 1.32 lbs this thing disappears into a glove box or daypack
- You drive a standard car or SUV (up to 8.5L gas or 6.0L diesel) and want a lighter, more modern jump starter
❌ Who Should Skip All of These?
If you never drive a vehicle and just need a portable power bank for charging phones and laptops, you’d be better off with a dedicated power bank that has higher capacity and multiple USB-C PD ports. These GOOLOO units are jump starters first and power banks second.
For the vast majority of drivers who want a reliable jump starter that also handles USB Quick Charge, I’d point most people to the GOOLOO GP4000 — that extra 4000A peak and 24,000mAh battery give you way more margin for error when you’re stuck with a dead battery.
Frequently Asked Questions
Which one has faster USB charging — the GP4000 or the GT3000?
The GT3000 wins this hands down. It has 65W PD two-way fast charging that can fully recharge its own battery in just 0.8 hours, and it’ll quick-charge your phone or tablet way faster than the GP4000’s standard USB Quick Charge port. If fast device charging is your priority, the GT3000 is the clear choice.
Is the GP4000 worth the extra money over the GT3000?
That depends on what you’re driving. The GP4000 gives you 4000A peak and a 24,000mAh battery compared to the GT3000’s 3000A peak and 12,000mAh battery. If you own a big diesel truck or an RV, the GP4000 is absolutely worth it. For a standard sedan or SUV, the GT3000 has plenty of power and you won’t miss the extra capacity.
Which jump starter is better for cold weather starting?
Both are rated to work in extreme cold, but the GP4000 has a slight edge with its operating range of -4°F to 140°F compared to the GT3000’s -4°F to 131°F. More importantly, the GP4000’s larger 24,000mAh battery means it’ll have more reserve power to crank a cold, sluggish engine. I’d take the GP4000 if you live somewhere with harsh winters.
Can the GT3000 charge a laptop with its USB-C port?
Yes, it absolutely can. That 65W PD output is plenty powerful to charge most laptops, including MacBooks and ultrabooks. The GP4000’s USB ports are better suited for phones and tablets since they don’t support the same high-wattage PD standard. This is actually one of the biggest reasons to pick the GT3000 over the GP4000.
Which one is lighter and easier to carry around?
The GT3000 is dramatically lighter at only 1.32 lbs, compared to the GP4000’s 3.9 lbs. That’s nearly 3 pounds lighter. If you’re someone who wants to keep a jump starter in your daily backpack or take it on motorcycle trips, the GT3000 is the obvious pick. The GP4000 is better suited for living in your car’s trunk.
How many times can each jump starter start a car on a full charge?
The GP4000’s 24,000mAh battery can jump-start most vehicles over 60 times on a single charge. The GT3000’s 12,000mAh battery will get you roughly half that, which is still plenty for most people. I’d only worry about this if you’re a tow truck driver or frequently helping strangers with dead batteries.
My Final Verdict
If I had to pick just one, the GOOLOO GP4000 is my overall winner. That 4000A peak and 24,000mAh battery give you the raw power to start almost anything on the road, and the USB Quick Charge port handles phones just fine for most people. The GT3000 is the better pick if you absolutely need 65W PD fast charging for laptops and want a featherlight 1.32 lb unit to carry daily.
Still on the fence? Ask yourself this: do you drive a big diesel or want maximum jump-starting insurance? Get the GP4000. Do you want the fastest device charging and the lightest possible kit? Get the GT3000. You really can’t go wrong with either — they’re both solid, reliable units.
Winner: GOOLOO GP4000 Jump Starter
- Powerful and Reliable Car Battery Jump Starter - The 4000 amp booster pack...
- Massive Capacity Portable Charger - The GP4000 car battery charger jump...
For the driver who wants maximum power and peace of mind — 4000A peak, 24,000mAh capacity, and support for engines up to 10.0L diesel. The USB Quick Charge is a nice bonus on top of serious jump-starting muscle.
Runner-Up: GOOLOO GT3000 Jump Starter
- 65W Two-Way Fast Charging: No more long waits. Powered by PD 65W fast...
- Real 3000A Jump Starter: As a compact car battery jump starter, GOOLOO...
For the buyer who prioritizes ultra-fast device charging and portability — 65W PD two-way charging in a 1.32 lb package that recharges in just 0.8 hours. Perfect for everyday carry and standard vehicles.
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