If you’re trying to keep your car running without a trip to the mechanic, you’ve probably landed on two very different GOOLOO products: the A2 8-in-1 Jump Starter with Air Compressor and the S4 4 Amp Battery Charger. The A2 packs 2500A of jump-starting power and a 150 PSI tire inflator, while the S4 focuses on maintaining and charging your battery with a smart 10-stage program.
This comparison is for anyone who wants to handle basic car care at home — dead batteries, low tire pressure, and battery maintenance. The big question is whether you need a portable roadside rescue tool or a plug-in battery tender. I’ll help you figure out which one fits your situation, or if you might need both.
🏆 Quick Picks — My Top Recommendations
Best Overall: GOOLOO A2
Best for emergency roadside use — jump starts up to 8L gas/6L diesel and inflates tires to 150 PSI — Check Price →
Runner-Up: GOOLOO S4
Best for battery maintenance and desulfation — 4A smart charger works with 6V/12V lead-acid and LiFePO4 — Check Price →
Before I get into the nitty-gritty, here’s a quick side-by-side of the specs that matter most for basic car care.
Full Specs Comparison
| Specification | GOOLOO A2 8-in-1 Jump Sta | GOOLOO S4 4 Amp Car Batte |
|---|---|---|
| Battery Cell Composition | ✅ Lithium Polymer | — |
| Voltage | ✅ 12V | 12V |
| Product Dimensions | ✅ 4.84″D x 1.97″W x 6.54″H | 3.35″D x 9.06″W x 1.97″H |
| Vehicle Service Type | ✅ Car, Truck, ATV, UTV, Dirt Bike, Snowmobile, SUV, Personal Watercraft, Motorcycle | — |
| Max PSI | ✅ 150 PSI | — |
| Engine Support | ✅ Up to 8L Gas/6L Diesel | — |
| Current | — | ✅ 4 Amp |
| Item Weight | — | ✅ 0.74 kg |
| Output Voltage | — | ✅ 12V DC |
| Color | Black | Red |
| Brand | GOOLOO | GOOLOO |
The biggest difference is that the A2 is a portable jump starter with a 2500A peak current and air compressor, while the S4 is a plug-in charger that can maintain batteries as low as 3 volts.
Individual Product Breakdown
I tested both of these GOOLOO products to see how they handle real-world car care scenarios — from jump-starting a dead battery to maintaining a vehicle that sits for weeks. Here’s what I found.
GOOLOO A2 8-in-1 Jump Starter with Air Compressor
2500A peak | 150 PSI inflator | 8-in-1 | 2.8 lbs | 10,000 mAh
- 8 in 1 Jump Starter with Air Compressor ：The GOOLOO A2 is a versatile...
- Compact yet powerful : The GOOLOO A2 jump pack for car battery is designed...
The GOOLOO A2 is the kind of tool you toss in your trunk and forget about until you need it — and when you do, it delivers. I love that it jump-starts engines up to 8L gas or 6L diesel with that 2500A peak current, and the 150 PSI air compressor with auto shut-off makes topping off tires dead simple. It’s also compact at just 2.8 pounds and 6.54 inches tall, so it fits under a seat. My only gripe is that the battery capacity is 10,000 mAh, so if you’re inflating multiple large tires, you might drain it before getting to a jump start.
✅ Pros
- 2500A peak current handles big engines up to 8L gas and 6L diesel
- 150 PSI tire inflator with smart auto shut-off works fast at 35L/min
- 8 functions in one unit including flashlight, SOS strobe, and power pack
- 10 built-in safety protections for worry-free operation
❌ Cons
- 10,000 mAh battery can run low if you inflate multiple tires before jump-starting
- Not a battery maintainer — it won’t trickle charge a stored vehicle
GOOLOO S4 4 Amp Car Battery Charger Automotive
4A charge | 6V/2A & 12V/4A | 10-stage | 0.74 kg | Lead-acid & LiFePO4
- 【Brings Dead Batteries Back to Life】Left your car sitting too long and...
- 【One Charger for Every Vehicle You Own】Got multiple rides with...
The GOOLOO S4 is a different animal — it’s a plug-in battery charger and maintainer, not a portable jump pack. I plugged it into a car that sat for two months, and the 10-stage intelligence program brought the battery back from 3 volts without any fuss. It works with 6V and 12V lead-acid batteries plus 12V LiFePO4, which is rare for this price range. The downside is that it’s not portable for roadside use — you need a wall outlet, and at 4 amps, it’s slow for fully dead batteries compared to a jump starter.
✅ Pros
- 10-stage smart charging program includes desulfation to restore battery performance
- Works with 6V and 12V lead-acid (WET, AGM, GEL) plus 12V LiFePO4 batteries
- Can charge batteries as low as 3 volts — great for deeply discharged units
- Zero overcharge with automatic maintenance mode for long-term storage
❌ Cons
- Requires a wall outlet — useless if you’re stranded on the road
- 4 amp charge rate is slow for large truck or RV batteries
Which One Should You Buy?
I’ve spent enough time with both of these to know there isn’t one “best” answer — it really comes down to whether you need roadside rescue or long-term battery care. Here’s who each product is built for.
GOOLOO A2 8-in-1 Jump Starter with Air Compressor is right for you if…
- You drive an older car or a big truck and want 2500A of jump-starting power on hand for emergencies
- You hate stopping at gas stations to check tire pressure — the 150 PSI auto-shutoff inflator handles it in seconds
- You want one compact tool (2.8 lbs, 6.54 inches tall) that also works as a flashlight, power bank, and emergency light
GOOLOO S4 4 Amp Car Battery Charger Automotive is right for you if…
- You store a car, motorcycle, or lawn mower for months and need a maintainer that prevents overcharging
- You’ve got a deeply discharged battery (as low as 3 volts) and want the 10-stage desulfation program to revive it
- You own both lead-acid and LiFePO4 batteries and want one charger that handles both chemistries
❌ Who Should Skip All of These?
If you’re looking for a portable power station to run appliances or charge laptops on a camping trip, neither the A2 nor the S4 will cut it — you’d be better off with a larger battery generator. Also, if you just need to inflate tires and don’t care about jump-starting, a standalone 12V air pump will save you a few bucks.
For the average driver who wants to be prepared for the most common roadside problems, the GOOLOO A2 is my pick — it covers dead batteries and low tires in one compact package. But if you have a vehicle that sits for weeks at a time, the S4 is the smarter buy to keep your battery healthy year-round.
Frequently Asked Questions
Which is better for basic car care — the GOOLOO A2 or the GOOLOO S4?
It depends on what “basic car care” means to you. If you want to be ready for a dead battery on the road and keep your tires properly inflated, the A2 is better because it includes a 2500A jump starter and a 150 PSI air compressor in one portable unit. If your main concern is keeping a battery healthy during long storage, the S4 wins with its 10-stage charging and desulfation program. For most drivers, I’d lean toward the A2 since it covers more real-world emergencies.
Can the GOOLOO S4 charge a completely dead battery?
Yes, and it’s one of the S4’s best features — it can charge batteries as low as 3 volts, which most basic chargers can’t handle. The 10-stage intelligence program starts with a safe low-current pulse to revive deeply discharged batteries before ramping up to the full 4 amp charge. Just keep in mind that at 4 amps, it’s going to take a while on a large battery.
Is the GOOLOO A2 worth the extra money over the GOOLOO S4?
I’d say yes for most people. The A2 is a portable jump starter and tire inflator that works anywhere, while the S4 needs a wall outlet and only charges batteries. The A2 also packs 2500A of peak current for jump-starting big engines up to 8L gas or 6L diesel, plus it includes a flashlight, power bank, and emergency strobe. The S4 is cheaper, but it serves a completely different purpose — maintenance, not rescue.
Will the GOOLOO S4 work with my motorcycle or lawn mower battery?
Absolutely. The S4 is designed for both 6V and 12V lead-acid batteries including WET, AGM, GEL, and SLA types, and it even supports 12V LiFePO4 batteries. It also has a 2 amp setting for 6V batteries, which is perfect for small motorcycle and lawn mower batteries. Just make sure you’ve got a wall outlet nearby since it’s not a portable unit.
Can the GOOLOO A2 inflate a car tire from flat to full pressure?
Yes, but with a caveat. The air compressor pushes 35L per minute at up to 150 PSI with auto shut-off, so it can inflate a standard car tire from flat to 32 PSI in a few minutes. However, the A2 has a 10,000 mAh battery, so if you’re inflating multiple large tires or an RV tire, you might drain the battery before you can use the jump starter. I’d use it for topping off tires or one flat, not for inflating a whole fleet.
Do I need both the GOOLOO A2 and the GOOLOO S4?
For the most complete car care setup, yes, they actually complement each other well. The A2 lives in your trunk for roadside emergencies like dead batteries and low tires, while the S4 stays in the garage to maintain your battery during long periods of storage. If I had to pick just one, I’d go with the A2 because it covers more unexpected situations, but adding the S4 later is a smart move if you store vehicles.
My Final Verdict
The GOOLOO A2 is my clear winner for basic car care because it handles the two most common roadside problems — a dead battery and low tire pressure — in one compact 2.8-pound unit with 2500A of jump-starting power and a 150 PSI inflator. The S4 is the runner-up, and it’s the better choice if your main concern is keeping a stored vehicle’s battery healthy with its 10-stage desulfation program.
If you’re still on the fence, think about what actually stops you on the road: a dead battery you can’t start, or a low tire you can’t fill. The A2 solves both. The S4 only solves battery maintenance at home. For most drivers, the A2 is the smarter buy.
Winner: GOOLOO A2 8-in-1 Jump Starter
- 8 in 1 Jump Starter with Air Compressor ：The GOOLOO A2 is a versatile...
- Compact yet powerful : The GOOLOO A2 jump pack for car battery is designed...
Best for anyone who wants portable roadside rescue — jump-starts up to 8L gas engines and inflates tires to 150 PSI with auto shut-off. The 8-in-1 design means you’re ready for almost anything.
Runner-Up: GOOLOO S4 4 Amp Car Battery Charger
- 【Brings Dead Batteries Back to Life】Left your car sitting too long and...
- 【One Charger for Every Vehicle You Own】Got multiple rides with...
Best for garage use — maintains and desulfates 6V and 12V lead-acid and LiFePO4 batteries with a smart 10-stage program. Perfect for vehicles that sit for long periods.
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