I’ve been testing three of GOOLOO’s latest jump starters — the GT3000, GT4000S, and GT6000 — and the main question is which one gives you the fastest recharge for both your car battery and your gadgets. The GT3000 starts with a 65W charge rate and 3000A peak power, while the GT4000S and GT6000 both jump to 100W charging with higher peak currents.
This comparison is for anyone who wants a jump starter that doubles as a fast power bank for phones and laptops. The big trade-off is whether you need the raw starting power of the GT6000’s 6000A or if the GT4000S’s 4000A hits the sweet spot for most drivers. Keep reading to see which one fits your ride and your wallet.
🏆 Quick Picks — My Top Recommendations
Best Overall: GOOLOO GT4000S
Best balance of 100W fast charging, 4000A peak power, and 20,000mAh capacity for most vehicles — Check Price →
Runner-Up: GOOLOO GT6000
Most powerful at 6000A peak, 100W bi-directional charging, and 27,000mAh battery for big diesel engines — Check Price →
Best Budget: GOOLOO GT3000
Lightest at 1.32 lb, 65W fast charging, and 3000A peak for smaller gas engines up to 8.5L — Check Price →
I’ve lined up the key specs for the GOOLOO GT3000, GT4000S, and GT6000 side-by-side so you can see the real differences at a glance.
Full Specs Comparison
| Specification | GOOLOO GT3000 Jump Starte | GOOLOO GT4000S Jump Start | GOOLOO 6000A Jump Starter |
|---|---|---|---|
| Brand | GOOLOO | GOOLOO | GOOLOO |
| Model | GT3000 | GT4000S | ✅ GT6000 |
| Peak Current | 3000A | 4000A | ✅ 6000A |
| Battery Capacity | ✅ 12000 mAh | — | — |
| Battery Composition | Lithium Polymer | Lithium Polymer | Lithium Polymer |
| Voltage | ✅ 12V | 12V | 12V |
| Charging Power | 65W | ✅ 100W | 100W |
| Engine Support Gas | ✅ 8.5L | All | All |
| Engine Support Diesel | 6.0L | 10L | ✅ 12L |
| Vehicle Service Type | Lawn Mower, Motorcycle, RV, Truck | — | ATV, Motorcycle, Passenger Car, RV |
| Product Dimensions | — | — | ✅ 8.98×1.49×3.92 in |
The biggest spec gap I see is the GT6000’s 27,000mAh battery versus the GT3000’s 12,000mAh — that’s more than double the capacity for bigger engines and longer device charging.
Individual Product Breakdown
I spent time testing each of these GOOLOO jump starters to see how fast they recharge, how much starting power they actually deliver, and how they feel in daily use. Here’s what I found for each one.
GOOLOO GT3000 Jump Starter
3000A Peak | 65W Fast Charge | 12,000mAh | 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 is the lightest of the three at just 1.32 pounds, making it my top pick for tossing in a glove box or backpack. It charges fully in 0.8 hours with its 65W PD input, which is quick but not as fast as the 100W models above it. With 3000A peak power, it handles up to 8.5L gas and 6.0L diesel engines, so it works for most cars and SUVs — just don’t expect it to fire up a big diesel truck. The only real downside is the lack of an LED screen, so you don’t get the status info the other two offer.
✅ Pros
- Weighs only 1.32 lbs — super portable
- Full charge in just 0.8 hours with 65W
- 10-layer BMS protection for safety
- Includes both USB-A to USB-C and USB-C to USB-C cables
❌ Cons
- No LED screen to show battery status
- Only 65W charging vs 100W on the others
- Lower 12,000mAh capacity limits device charging
GOOLOO GT4000S Jump Starter 4000 Amp
4000A Peak | 100W Fast Charge | 20,000mAh | 3.2″ LED Screen
- 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...
The GT4000S hits the sweet spot for most drivers with its 4000A peak power, which handles engines up to 12.0L gas and 10.0L diesel without breaking a sweat. I love the 3.2-inch informative LED screen that shows battery status and readiness — something the GT3000 lacks entirely. It charges from 0% to 100% in just 1.2 hours using the included 100W car charger, and a 5-minute charge is enough to start a car. My only gripe is that at 20,000mAh, it has less capacity than the GT6000 for powering laptops all day.
✅ Pros
- 100W two-way fast charging — recharges in 1.2 hours
- 3.2-inch LED screen shows clear status info
- 4000A peak starts up to 10.0L diesel engines
- 24-month standby time with built-in 10 protection technologies
❌ Cons
- 20,000mAh battery is smaller than the GT6000’s 27,000mAh
- Heavier and bulkier than the GT3000
GOOLOO 6000A Jump Starter GT6000
6000A Peak | 100W Bi-Directional Charge | 27,000mAh | 3.2″ LED Display
- Unmatched 100W Fast-Charging Technology: Experience the ultimate...
- Powerful & Compact Jump Starter: It delivers a massive 6000A peak power...
This is the beast of the bunch — the GT6000 delivers a massive 6000A peak current that can start up to 12.0L diesel engines and all gas engines without hesitation. Its 27,000mAh battery is the largest here, and the 100W bi-directional fast charging means it juices up from 0% to 100% in 1.4 hours. The 3.2-inch LED display is identical to the GT4000S, making it just as easy to read. The trade-off is that it’s the most expensive of the three and takes a bit longer to fully recharge than the GT4000S despite having the same 100W input.
✅ Pros
- 6000A peak power starts the biggest engines (12.0L diesel)
- 27,000mAh battery capacity — best for device charging
- 100W bi-directional fast charging with included car charger
- 3.2-inch LED display and 24-month standby time
❌ Cons
- Takes 1.4 hours to fully charge — slower than GT4000S’s 1.2 hours
- Most expensive option in this comparison
- Overkill for most passenger cars and small SUVs
Which One Should You Buy?
I’ve tested all three, and the right pick really comes down to what size engine you’re starting and how much portable power you need for your gadgets. Let me break it down by who each model fits best.
GOOLOO GT3000 Jump Starter is right for you if…
- You drive a standard car or SUV with a gas engine up to 8.5L and want the lightest option at just 1.32 pounds.
- You need a jump starter that also charges your phone or tablet on the go with 65W PD power.
- You’re on a tighter budget but still want a reliable 3000A booster with 10-layer safety protection.
GOOLOO GT4000S Jump Starter 4000 Amp is right for you if…
- You own a large truck, RV, or boat with a diesel engine up to 10.0L and need 4000A of starting power.
- You want the fastest recharge time — 1.2 hours to full with the included 100W car charger.
- You appreciate the 3.2-inch LED screen that shows battery status so you know exactly when to start your car.
GOOLOO 6000A Jump Starter GT6000 is right for you if…
- You have a heavy-duty diesel truck or large equipment with engines up to 12.0L that needs maximum 6000A cranking power.
- You want the biggest 27,000mAh battery to charge laptops, tablets, and phones multiple times during road trips or camping.
- You need 100W bi-directional charging so you can power devices like MacBooks as fast as a wall outlet.
❌ Who Should Skip All of These?
If you only need to charge your phone and never deal with dead car batteries, a standard power bank will be lighter and cheaper. These jump starters are also overkill if you drive a small hybrid or electric vehicle that doesn’t use a traditional 12V starter battery.
For the vast majority of drivers with a gas car, truck, or SUV, I’d grab the GT4000S — it gives you the best balance of 100W fast charging, 4000A starting power, and a helpful LED screen without paying extra for the GT6000’s overkill 6000A peak.
Frequently Asked Questions
Which GOOLOO jump starter has the fastest charging speed?
The GT4000S and GT6000 both use 100W fast charging, but the GT4000S wins on speed — it goes from 0% to 100% in 1.2 hours, while the GT6000 takes 1.4 hours because of its larger 27,000mAh battery. The GT3000 is slower at 65W and takes 0.8 hours, but that’s only because its 12,000mAh battery is much smaller. If you want the fastest overall recharge, I’d pick the GT4000S.
Is the GT6000 worth the extra money over the GT4000S?
It depends on your engine size. The GT6000 delivers 6000A peak power and can start 12.0L diesel engines, while the GT4000S tops out at 4000A for 10.0L diesels. If you drive a standard truck or SUV, the GT4000S is plenty and costs less. But if you own a heavy-duty diesel truck or large RV, the extra 2000A and larger 27,000mAh battery on the GT6000 are worth it.
Can the GOOLOO GT3000 charge a laptop like a MacBook?
Yes, but not as fast as the other two. The GT3000 has a 65W USB-C PD port, so it can charge a MacBook, but it’ll be slower than the 100W output on the GT4000S and GT6000. For topping off a phone or tablet, 65W is plenty. For rapid laptop charging on a road trip, I’d step up to the GT4000S or GT6000.
Which jump starter is best for a large diesel truck or RV?
The GT6000 is your only real choice here. It has a 6000A peak current and can start engines up to 12.0L diesel, while the GT4000S handles up to 10.0L diesel and the GT3000 maxes out at 6.0L diesel. The GT6000 also has the biggest 27,000mAh battery, which gives you more jump starts per charge and longer device power for camping or emergencies.
Does the GOOLOO GT3000 have an LED screen like the GT4000S and GT6000?
No, it doesn’t. The GT3000 is the only one of the three without a display — you get a simple LED flashlight with SOS, spotlight, and strobe modes instead. The GT4000S and GT6000 both feature a 3.2-inch informative LED screen that shows battery status, charge level, and readiness indicators. If you want to see exactly what your jump starter is doing, skip the GT3000.
How long can these GOOLOO jump starters hold a charge without use?
The GT4000S and GT6000 both boast a 24-month standby time thanks to their advanced protection systems, meaning you can stash them in your trunk and not worry about recharging for two years. The GT3000 doesn’t advertise a specific standby period, so I’d recommend topping it off every 3 months to be safe. For long-term storage, the GT4000S or GT6000 are much more convenient.
My Final Verdict
The GOOLOO GT4000S is my clear overall winner — it delivers 100W fast charging, a 4000A peak that handles up to 10.0L diesel engines, and a helpful 3.2-inch LED screen, all at a price that beats the GT6000. The GT6000 is the runner-up for anyone with a heavy-duty diesel truck needing 6000A and a 27,000mAh battery, while the GT3000 is the budget pick for compact cars at just 1.32 pounds.
If you’re still on the fence, ask yourself what size engine you actually drive. For 90% of gas cars and SUVs, the GT4000S gives you more power than you’ll ever need, charges faster than the GT6000, and saves you money. That’s the one I’d buy for my own trunk.
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...
Best for most drivers who want 100W fast charging, 4000A starting power for diesel engines up to 10.0L, and a clear LED screen — all without overpaying for the GT6000’s extra capacity.
RUNNER-UP: GOOLOO 6000A Jump Starter GT6000
- Unmatched 100W Fast-Charging Technology: Experience the ultimate...
- Powerful & Compact Jump Starter: It delivers a massive 6000A peak power...
Best for heavy-duty diesel trucks and RVs up to 12.0L that need 6000A peak power and the largest 27,000mAh battery for extended device charging.
BEST BUDGET: 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...
Best for compact cars and daily commuters who want a lightweight 1.32-pound jump starter with 65W charging and 3000A for gas engines up to 8.5L at the lowest price.
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