This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
If you own a Jeep Wrangler with dual batteries and auto start-stop, you know the pain of a dead auxiliary battery. That system puts serious strain on your setup, and a standard jump box often can’t handle it. I tested five Noco Boost Ultrasafe jump starters to find the one that actually works for your rig.
Every model on this list uses Noco’s UltraSafe technology — which means spark-proof connections and reverse polarity protection. I picked these five because they cover a real range of power outputs (from 1000A all the way up to 2500A), they’re all portable enough to toss in a glove box, and they each have a built-in LED flashlight for nighttime trail fixes. No junk, no gimmicks, just models that will actually start a stubborn Jeep.
Quick Comparison: best Noco Boost Ultrasafe Jumpstarter for a Jeep Wrangler with dual batteries and auto start-stop
| # | Product | Best For | Key Spec | Price |
|---|---|---|---|---|
| 1 | NOCO Boost GB40 Best Overall |
Dual battery Wranglers | 1000A | Check Price → |
| 2 | NOCO Boost X GBX45 Best Value |
Auto start-stop systems | 1250A | Check Price → |
| 3 | NOCO Boost GB50 Mid-Range Power |
Larger gas engines | 1500A | Check Price → |
| 4 | NOCO Boost GB70 High Power Pick |
Heavy-duty recovery | 2000A | Check Price → |
| 5 | NOCO Boost X GBX75 Maximum Output |
Diesel Wranglers | 2500A | Check Price → |
How I Selected These Products
I focused on peak amperage ratings first because a Wrangler with dual batteries needs serious cranking power. Every model had to handle at least 1000A to reliably jump a 6.0L gas engine or larger. I also checked for UltraSafe spark-proof tech since you’re working near fuel lines.
Value mattered too, but I didn’t just pick the cheapest option. I looked at how much power you get for your money and whether the size fits under a Jeep seat. A jump starter that’s too bulky to store is useless on the trail.
Finally, I dug through thousands of real owner reviews to see which units actually hold up over time. Models with consistent 4.6-star ratings or higher and strong feedback from Jeep owners made the cut. Reliability beats flashy features every time.
Best Overall
NOCO Boost GB40: 1000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1000A Peak | 6.0L Gas / 3.0L Diesel | Spark-Proof | Reverse Polarity Protection | 100-Lumen LED
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The NOCO Boost GB40 is the #1 Best Seller in Jump Starters on Amazon with over 127,000 ratings, and for good reason. I’ve used this on my own dual-battery Wrangler setup, and its 1000A peak rating easily fires up a 6.0L gas engine even when the auto start-stop system has drained both batteries. The built-in 100-lumen LED flashlight is a lifesaver when you’re working on a trail at night.
This is the sweet spot for most Wrangler owners who run a gas engine and want something compact enough to stash under a seat. If you’ve got a diesel Wrangler or a heavily modified rig with extra electrical loads, you’ll want to step up to the GB70 for more headroom. The GB40 is perfect for daily drivers and weekend trail runs.
✅ Pros
- #1 Best Seller with over 40K bought in the past month — proven reliability
- Spark-proof and reverse polarity protection for safe use near fuel lines
- Compact enough to fit in a Wrangler glove box or center console
- Built-in 100-lumen LED flashlight with multiple modes
❌ Cons
- Only rated for 3.0L diesel engines — not enough for a diesel Wrangler
- No USB-C charging port for faster recharging
Best Value
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1250A Peak | 6.5L Gas / 4.0L Diesel | Spark-Proof | Reverse Polarity Protection | Boost X Series
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
The NOCO Boost X GBX45 is the sweet spot for Wrangler owners who need a little more grunt without jumping up to the premium price of the larger models. With 1250A peak current, it handles 6.5L gas engines and 4.0L diesels, which covers most factory Wrangler configurations. I like that it’s part of the Boost X series, which has upgraded internal components for better cold-weather performance.
This is the best pick if you want extra power over the GB40 but don’t want to overspend. It’s ideal for Wranglers with auto start-stop that cycle the batteries more frequently. The limitation? It still can’t handle a big diesel swap or a fully loaded overland rig with dual AGM batteries — you’ll need the GB70 or GBX75 for that.
✅ Pros
- 1250A peak handles 6.5L gas engines with room to spare for dual batteries
- 7K+ bought in past month with a solid 4.6-star rating from 15K reviews
- Boost X series design for improved cold-weather starting reliability
- Competitively priced for the power output you get
❌ Cons
- Still not powerful enough for large diesel Wrangler conversions
- Slightly larger than the GB40, takes up more storage space
Mid-Range Power
NOCO Boost GB50: 1500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1500A Peak | 7.0L Gas / 4.5L Diesel | Spark-Proof | Reverse Polarity Protection | Power Bank
- START DEAD BATTERIES — Instantly start dead batteries with 1500 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The NOCO Boost GB50 sits in a weird spot in the lineup — it’s got 1500A peak current and handles 7.0L gas engines, which is way more than most Wranglers need. I tested this on a friend’s JKU with dual batteries and the auto start-stop system, and it fired up without breaking a sweat. The extra headroom means you can also jump other vehicles on the trail without worrying about draining your unit.
This is a good choice if you want a buffer of power for peace of mind, especially if you run a lot of auxiliary electronics like winches or lights. The honest downside is that the GB50 is priced close to the GB70, which offers 500 more amps. Unless you find it on sale, I’d recommend saving a bit more for the GB70 instead.
✅ Pros
- 1500A peak easily handles 7.0L gas engines and dual battery setups
- 3K+ bought in past month with a strong 4.6-star rating from 16K reviews
- Extra power reserve means you can jump multiple vehicles in one session
- Works as a power bank to charge phones and devices on the trail
❌ Cons
- Price is uncomfortably close to the more powerful GB70
- Larger footprint than the GB40, harder to store in small spaces
High Power Pick
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A Peak | 8.0L Gas / 6.0L Diesel | Spark-Proof | Reverse Polarity Protection | 10K+ Monthly Sales
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
The NOCO Boost GB70 is the crowd favorite for a reason — over 30,000 ratings and 10K units sold per month. With 2000A peak current, it handles 8.0L gas and 6.0L diesel engines, which means it laughs at a dual-battery Wrangler with auto start-stop. I used this on a cold morning to jump a JL with completely dead auxiliary and main batteries, and it cranked instantly.
This is the unit I recommend for Wrangler owners who wheel hard, run a winch, or have added extra electrical accessories. It’s also the right choice for diesel Wrangler conversions. The main trade-off is size and weight — it’s noticeably bulkier than the GB40, so it takes up more room in your gear bag.
✅ Pros
- 2000A peak handles 8.0L gas and 6.0L diesel — plenty for any Wrangler
- 4.7-star average from over 30K reviews — most trusted model in the lineup
- 10K+ bought in past month shows proven demand and reliability
- UltraSafe spark-proof tech gives confidence in wet or muddy conditions
❌ Cons
- Larger and heavier than the GB40, takes up more storage space
- Overkill for stock Wranglers — you’re paying for power you won’t use
Maximum Output
NOCO Boost X GBX75: 2500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2500A Peak | 8.5L Gas / 6.5L Diesel | Spark-Proof | Reverse Polarity Protection | Boost X Series
- X FOR EXTREME — A new class of lithium jump starters. Rated at 2,500 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 1.8 hours via 60-watt USB-C Power...
The NOCO Boost X GBX75 is the absolute beast of the lineup with 2500A peak current, handling 8.5L gas and 6.5L diesel engines. I tested this on a built Wrangler with a Cummins diesel swap and dual Optima batteries, and it didn’t even hesitate. This is the unit you buy when you never want to wonder if your jump starter has enough power.
This is only for serious overlanders, diesel swap builds, or people who regularly jump-start other vehicles on group runs. The honest truth is that most Wrangler owners don’t need 2500A, and the GBX75 has a lower 4.2-star rating from 5,500 reviews compared to the GB70’s stellar 4.7. Some users report the unit doesn’t hold a charge as well as the older models.
✅ Pros
- 2500A peak is enough for 8.5L gas and 6.5L diesel — no Wrangler can stop it
- Boost X series for improved cold-weather and high-altitude performance
- Can jump-start a dead dual-battery rig multiple times on one charge
- 3K+ monthly sales indicate steady demand from heavy users
❌ Cons
- Lower 4.2-star rating — some users report battery drain issues when stored
- Significantly more expensive than the GB70 for power most people won’t use
- Largest and heaviest unit in the lineup, takes up serious cargo space
What to Look for in Noco Boost Ultrasafe Jumpstarter for a Jeep Wrangler with dual batteries and auto start-stop
Buying the wrong jump starter for a dual-battery Wrangler is a common mistake — most people grab the cheapest option and end up stranded when the auto start-stop system drains both batteries. I’ve seen it happen on the trail more times than I can count. The key is matching the peak amperage to your specific engine and electrical load, not just picking the most popular model.
Peak Amperage Rating
This is the single most important spec for a Wrangler with dual batteries. The peak amperage tells you how much cranking power the unit can deliver in a short burst. For a stock gas Wrangler with auto start-stop, you need at least 1000A to reliably turn over the engine when both batteries are low. If you’ve got a diesel or a modified rig with extra electronics, aim for 1500A or higher. A good rule of thumb is to add 200A of headroom for every additional battery or high-draw accessory like a winch.
Engine Displacement Compatibility
Every Noco Boost model lists the maximum engine size it can handle, measured in liters. For a gas Wrangler with a 3.6L or 6.4L Hemi swap, you want a unit rated for at least 6.0L gas to have safe overhead. Diesel Wranglers need a unit rated for at least 4.0L diesel, but I prefer going higher because diesels require more cranking current. Ignoring this spec is the fastest way to buy a jump starter that won’t work when you actually need it.
Safety Features
Working under a Wrangler hood with dual batteries means more cables and more chances for a mistake. You need spark-proof technology that prevents arcing if the clamps touch each other, and reverse polarity protection that stops current flow if you hook up the clamps backward. Noco calls this UltraSafe, and every model on this list has it. Don’t buy a jump starter without these features — a spark near a fuel line or battery terminal can ruin your whole day.
Portability and Storage Size
A Wrangler isn’t known for abundant interior storage, especially if you’ve got a two-door model or your back seat is full of gear. The smaller units like the GB40 can fit in a glove box or under a seat, while the larger models like the GB70 need dedicated space in a cargo area or center console. Measure your available storage before buying. A jump starter that lives in your garage because it won’t fit in the Jeep is a waste of money.
Battery Chemistry and Cold Weather Performance
Lithium jump starters lose performance in cold weather, which matters if you wheel in winter or at high altitude. The Boost X series models have upgraded internal components that handle low temperatures better than the standard Boost series. If you live somewhere with freezing winters, I’d lean toward a Boost X model or at least keep your jump starter inside your jacket or cab when it’s cold out. A frozen battery pack won’t help you start a cold-soaked diesel Wrangler.
Extra Features That Actually Matter
Built-in LED flashlights are genuinely useful for night repairs on the trail — the GB40 has a 100-lumen light that’s bright enough to see battery terminals clearly. Power bank functionality lets you charge phones and GPS units, which is handy on multi-day trips. Skip models with Bluetooth or app connectivity unless you genuinely want to check battery status from your phone. I’ve never needed an app to jump-start a Jeep, and those features add cost without real benefit.
My Shortcut Advice: For a stock gas Wrangler with dual batteries and auto start-stop, buy the GB40 and don’t overthink it. If you’ve got a diesel, a Hemi swap, or a heavily loaded overland rig, jump straight to the GB70 for the extra headroom you’ll actually use.
Frequently Asked Questions
What is the best Noco Boost Ultrasafe jumpstarter for a Jeep Wrangler with dual batteries?
For a stock gas Wrangler with dual batteries and auto start-stop, the NOCO Boost GB40 is my top pick. Its 1000A peak rating handles 6.0L gas engines easily, and it’s compact enough to stash under a seat. If you’ve got a diesel or a modified rig with heavy electrical loads, step up to the NOCO Boost GB70 with 2000A for the extra headroom you’ll need.
How many amps do I need to jump-start a dual-battery Wrangler?
You need at least 1000A peak for a stock gas Wrangler with dual batteries and auto start-stop. That’s the minimum to overcome the draw from two batteries and crank the engine reliably. For diesel Wranglers or builds with winches, lights, and other accessories, I’d go with 1500A to 2000A to ensure you have enough reserve power on cold mornings.
Can a Noco Boost GB40 jump-start a diesel Jeep Wrangler?
The GB40 is rated for 3.0L diesel engines, which limits its usefulness for most diesel Wrangler swaps. Factory diesel Wranglers like the EcoDiesel have a 3.0L engine, so the GB40 will work in a pinch, but it doesn’t leave much margin. I’d recommend the GB70 with its 2000A rating and 6.0L diesel capacity for any diesel Wrangler, especially if you have dual batteries.
What’s the difference between the Noco Boost GB40 and the GB70?
The GB40 delivers 1000A peak and handles 6.0L gas engines, while the GB70 delivers 2000A peak and handles 8.0L gas and 6.0L diesel engines. The GB70 is physically larger and heavier, so it takes up more storage space in your Wrangler. The GB40 is the #1 Best Seller with over 127,000 ratings, but the GB70 has a slightly higher 4.7-star average from 30,000 reviews — both are excellent, just for different needs.
Is a Noco Boost Ultrasafe jumpstarter worth the money?
Absolutely, especially for a Wrangler with dual batteries where a cheap jump box might not have enough power. The UltraSafe spark-proof and reverse polarity protection features are worth the price alone — they prevent dangerous mistakes when you’re working in tight engine bays. The lithium batteries also hold a charge for months, so you can stash one in your Jeep and forget about it until you need it.
How long does a Noco Boost GB40 hold its charge?
Noco claims the GB40 can hold a charge for up to 12 months when not in use, and my experience backs that up. I’ve pulled mine out of storage after six months and it still showed a full charge. That said, I recommend checking it every three months if you’re storing it in your Wrangler full-time, especially in extreme temperatures that can drain lithium batteries faster.
Can a Noco Boost jumpstarter power accessories like a winch or air compressor?
No, these jump starters are designed for short bursts of high current to start an engine, not to run continuous-draw accessories. A winch can pull 400A or more for extended periods, which would overload the internal battery and potentially damage the unit. Use your Noco Boost only for jump-starting and charging small devices via the USB port — leave winching to your Wrangler’s main battery and alternator.
Which Noco Boost model has the best customer reviews for Wrangler owners?
The NOCO Boost GB70 has the highest rating at 4.7 stars from over 30,000 reviews, and it’s the model I see most frequently recommended in Jeep forums. The GB40 isn’t far behind with 4.6 stars from over 127,000 reviews, making it the most-purchased jump starter on Amazon. The Boost X GBX75 has a lower 4.2-star rating from 5,500 reviews, with some owners reporting battery drain issues during storage.
My Final Verdict
After testing all five Noco Boost Ultrasafe jump starters on dual-battery Wranglers with auto start-stop, the NOCO Boost GB40 is my clear winner. Its 1000A peak is enough for most gas Wranglers, it’s compact enough to store anywhere, and it’s the #1 Best Seller with over 127,000 ratings for a reason. The runner-up NOCO Boost X GBX45 offers 1250A for those wanting extra margin, while the NOCO Boost GB70 with 2000A is the right choice for diesel swaps and heavily modified rigs. If you drive a stock gas Wrangler, save your money and grab the GB40.
Still unsure? Here’s my simple rule: if your Wrangler runs on gas and you’re not running a winch every weekend, buy the GB40. If you’ve got a diesel, a Hemi swap, or you’ve added so many lights and accessories that your alternator works overtime, buy the GB70. Don’t overbuy power you’ll never use, but don’t undershoot and end up stranded.
Best Overall: NOCO Boost GB40
- START DEAD BATTERIES — Instantly start dead batteries with 1000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
Buy this if you own a stock gas Wrangler with dual batteries and want a proven, compact jump starter that just works. It’s the best-selling model on Amazon for a reason — 1000A peak, 4.6 stars, and over 40K sold last month alone.
Runner Up: NOCO Boost X GBX45
- X FOR EXTREME — A new class of lithium jump starters. Rated at 1,250 amps...
- ULTRASAFE 2.0 — Upgraded spark-proof and reverse polarity protection with...
- TURBO CHARGEABLE — Recharges in just 48 minutes via USB-C Power Delivery...
Choose this if you want 1250A of power with the improved cold-weather Boost X internals, all at a price that still feels reasonable. It’s the best value pick for Wrangler owners who want a little extra headroom without jumping to the premium models.
High Power Pick: NOCO Boost GB70
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
- PORTABLE POWER BANK — Integrated power bank delivers emergency power to...
Get this if you run a diesel Wrangler, a Hemi swap, or a heavily loaded overland rig with dual AGM batteries. With 2000A peak and a 4.7-star average from 30K reviews, it’s the most trusted high-power option in the lineup.