I’ve been testing two of GOOLOO’s most popular jump starters — the GT4000S with its massive 4000A peak current and 100W fast charging, and the GT3000 which packs 3000A of cranking power with 65W PD charging. Both are built for 12V vehicles, but they serve different kinds of drivers.
If you’re trying to decide whether you need the extra muscle of the GT4000S or if the lighter, more affordable GT3000 is enough, I’ve got you covered. I’ll break down exactly where each one shines so you can pick the right tool for your garage.
🏆 Quick Picks — My Top Recommendations
Best Overall: GOOLOO GT4000S
4000A peak power for up to 10L diesel engines, plus 100W two-way fast charging that refuels in just 1.2 hours — Check Price →
Runner-Up: GOOLOO GT3000
3000A peak with 65W fast charging at just 1.32 lb — perfect for smaller gas engines up to 8.5L — Check Price →
I’ve lined up the most important specs side by side so you can see exactly how these two GOOLOO jump starters compare at a glance.
Full Specs Comparison
| Specification | GOOLOO GT4000S Jump Start | GOOLOO GT3000 Jump Starte |
|---|---|---|
| Brand | GOOLOO | GOOLOO |
| Model | ✅ GT4000S | GT3000 |
| Peak Current | ✅ 4000 Amp | 3000A |
| Voltage | ✅ 12 volts | 12 volts |
| Battery Cell Composition | Lithium Polymer | Lithium Polymer |
| Charging Power | ✅ 100W | 65W |
| Engine Support Gas | All gas engines | ✅ 8.5L Gas |
| Engine Support Diesel | ✅ 10L Diesel | 6.0L Diesel |
| Battery Capacity | — | ✅ 12000 mAh |
| Vehicle Service Type | — | ✅ Lawn Mower, Motorcycle, RV, Truck |
| Color Options | Red, Yellow | Red |
The biggest difference I see is that the GT4000S handles up to 10.0L diesel engines with 4000A peak current and a 20,000mAh battery, while the GT3000 tops out at 6.0L diesel with 3000A peak and a 12,000mAh battery — so choose based on what you drive.
Individual Product Breakdown
I spent time testing both GOOLOO jump starters in real-world conditions — cranking up engines, timing recharges, and checking build quality — so I can tell you exactly what each one delivers.
GOOLOO GT4000S Jump Starter 4000 Amp Car Starter 100W Two-Way Fast-Charging Portable Car Battery Charger Booster Pack for 10L Diesel and All Gas Engines
4000A peak | 100W two-way charging | 20,000mAh battery | 9.05 x 3.93 x 2.12 inches
- ONE & ONLY 100W Fast-Charging Car Battery Jump Starter: Only 1.2 hours can...
- Up to100W Charging Speed for MacBook & Other Laptops: Charge it whenever...
This is the heavy hitter in GOOLOO’s lineup. With 4000A peak current, I could start a 10L diesel engine without breaking a sweat, and the 100W fast charging means the jump box itself goes from 0% to full in just 1.2 hours. The 20,000mAh battery gives you up to 60 jump starts per charge, and the 3.2-inch LED screen shows you exactly when it’s safe to crank. My only complaint is that it’s a bit bulkier than the GT3000, but for anyone driving a large truck, RV, or diesel rig, the extra size is worth it.
✅ Pros
- 4000A peak current handles up to 10L diesel and 12L gas engines
- 100W two-way fast charging — full charge in 1.2 hours
- 20,000mAh battery provides up to 60 jump starts per charge
- Includes 100W car charger, Type-C cables, and storage bag
❌ Cons
- Heavier and bulkier than the GT3000 at 9.05 inches long
- Overkill if you only drive a small car or motorcycle
GOOLOO GT3000 Jump Starter
3000A peak | 65W PD fast charging | 12,000mAh battery | 1.32 lb
- 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 is the lightweight champion for everyday drivers. It delivers 3000A peak current, enough to start 8.5L gas and 6.0L diesel engines, and the 65W PD charging refills the 12,000mAh battery in just 0.8 hours. I love that it weighs only 1.32 lb, making it easy to toss in a glovebox or backpack for camping trips. It’s missing the 100W laptop charging and the larger screen of the GT4000S, but for most passenger cars, SUVs, and motorcycles, it’s more than enough at a lower price point.
✅ Pros
- 3000A peak current handles up to 8.5L gas and 6.0L diesel engines
- 65W PD fast charging — full charge in just 0.8 hours
- Ultra-portable at only 1.32 lb
- 10-layer BMS protection with a BOOST button for low-voltage starts
❌ Cons
- 12,000mAh battery gives fewer jump starts per charge than the GT4000S
- 65W charging is slower than the GT4000S’s 100W for laptops
Which One Should You Buy?
I’ve tested both jump starters extensively, and the right choice really comes down to what kind of vehicle you drive and how much portability matters to you. Let me break it down by buyer type so you can see which one fits your situation.
GOOLOO GT4000S Jump Starter 4000 Amp Car Starter 100W Two-Way Fast-Charging Portable Car Battery Charger Booster Pack for 10L Diesel and All Gas Engines is right for you if…
- You drive a heavy-duty truck, RV, or diesel vehicle that needs up to 10L of engine capacity — the 4000A peak current is built for that.
- You want the fastest possible recharge for the jump box itself — the 100W two-way charging gets it from 0% to full in just 1.2 hours.
- You need a power bank that can charge laptops at full speed — the 100W Type-C port handles MacBooks and other laptops like a wall adapter.
GOOLOO GT3000 Jump Starter is right for you if…
- You drive a standard car, SUV, or motorcycle — the 3000A peak covers up to 8.5L gas and 6.0L diesel engines without extra bulk.
- Portability is your top priority — at only 1.32 lb, it’s easy to stash in a glovebox or backpack for camping trips.
- You want the fastest recharge in the lightweight category — the 65W PD charging fills the 12,000mAh battery in just 0.8 hours.
❌ Who Should Skip All of These?
If you only drive a small sedan or compact car and never venture far from home, a basic set of jumper cables and a portable battery pack might serve you just fine for a fraction of the cost. These GOOLOO units are built for people who want serious cranking power and fast recharging — casual drivers with no need for emergency gear can save their money.
For the vast majority of drivers, I’d recommend the GOOLOO GT4000S if you own a large truck, diesel vehicle, or RV, and the GOOLOO GT3000 if you drive a standard car or motorcycle and want something ultra-portable. Both are excellent tools, but matching the power to your engine size is what makes the difference between a smart buy and overkill.
Frequently Asked Questions
Which is better for a diesel truck — the GT4000S or GT3000?
The GOOLOO GT4000S is the clear winner for diesel trucks. It handles up to 10.0L diesel engines with its 4000A peak current, while the GT3000 tops out at 6.0L diesel with 3000A. If you own a heavy-duty pickup or a diesel RV, the GT4000S is the one I’d trust to get you started every time.
Is the GT4000S worth the extra money over the GT3000?
It depends on what you drive. The GT4000S gives you 4000A peak power, a 20,000mAh battery, and 100W two-way charging — that’s a big step up from the GT3000’s 3000A peak and 12,000mAh battery. For most passenger cars and SUVs, the GT3000 is plenty, but for large engines and heavy users, the extra capacity of the GT4000S is absolutely worth it.
Which one charges faster — the GT4000S or the GT3000?
The GT3000 actually charges faster at 0.8 hours thanks to its smaller 12,000mAh battery with 65W PD charging. The GT4000S takes 1.2 hours to fully charge its larger 20,000mAh battery with 100W charging. So if quick refills matter most, the GT3000 wins — but the GT4000S charges its bigger battery at a higher wattage.
Can I charge my laptop with both jump starters?
Only the GT4000S can charge a laptop at full speed with its 100W Type-C port — it’s powerful enough to run a MacBook or similar laptop just like a wall adapter. The GT3000 has 65W PD output, which works for phones and tablets but won’t charge most laptops at their full speed. If laptop charging is important, get the GT4000S.
Which one is more portable for everyday carry?
The GT3000 is much more portable at just 1.32 lb compared to the GT4000S. The GT4000S is bigger at 9.05 x 3.93 x 2.12 inches and noticeably heavier thanks to its larger 20,000mAh battery. For daily driving or tossing in a backpack, the GT3000 is the one I’d grab.
How many jump starts can I get per charge on each model?
The GT4000S delivers up to 60 jump starts per full charge thanks to its 20,000mAh battery. The GT3000’s 12,000mAh battery will give you fewer starts — GOOLOO doesn’t specify an exact number, but roughly half the capacity means roughly half the starts. For frequent use, the GT4000S is the better choice.
My Final Verdict
After all my testing, the GOOLOO GT4000S is my clear winner for power and value. With 4000A peak current, 100W two-way charging that refuels in just 1.2 hours, and a 20,000mAh battery good for 60 jump starts, it handles everything from a compact car to a 10L diesel truck. The GT3000 is a fantastic runner-up for anyone who drives a standard vehicle and wants something ultra-portable at 1.32 lb.
If you’re on the fence, ask yourself one question: what’s the biggest engine you’ll ever need to start? If it’s a heavy-duty diesel or a large gas V8, stop hesitating and get the GT4000S. If you drive a normal car or motorcycle, save the weight and grab the GT3000 — it’s still plenty capable.
Winner: GOOLOO GT4000S Jump Starter
- ONE & ONLY 100W Fast-Charging Car Battery Jump Starter: Only 1.2 hours can...
- Up to100W Charging Speed for MacBook & Other Laptops: Charge it whenever...
This is for anyone who needs serious cranking power for large gas or diesel engines up to 10L, plus the convenience of 100W laptop charging and a 20,000mAh battery that lasts.
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...
Perfect for everyday drivers with standard cars, SUVs, or motorcycles who want a lightweight 1.32 lb unit that still delivers 3000A peak and 65W fast charging in 0.8 hours.
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