If you drive a mid-size sedan and are shopping for a portable jump starter, you’re probably torn between the newer NOCO Boost X GBX45 and the proven NOCO Boost GB70. The GBX45 packs 1,250 amps for engines up to 6.5L gas, while the GB70 delivers 2,000 amps for engines up to 8.0L gas — but raw power isn’t everything.
This comparison is for daily drivers who want a reliable booster pack that fits in a glove box or trunk without weighing them down. The key trade-off here is extreme portability and fast USB-C charging versus raw starting power and battery capacity. Let me break down which one actually makes more sense for your sedan.
🏆 Quick Picks — My Top Recommendations
Best Overall: NOCO Boost X GBX45
More than enough power for any mid-size sedan and recharges in just 48 minutes via USB-C — Check Price →
Runner-Up: NOCO Boost GB70
Massive 2,000 amps with up to 40 jump starts per charge — overkill for sedans but great for larger vehicles — Check Price →
I’ve lined up the specs that matter most for a mid-size sedan owner right here so you can see exactly how these two NOCO jump starters compare.
Full Specs Comparison
| Specification | NOCO Boost X GBX45: 1250A | NOCO Boost GB70: 2000A Ul |
|---|---|---|
| Peak Current | 1250A | ✅ 2000A |
| Voltage | ✅ 12V | 12V |
| Battery Type | Lithium | Lithium Ion |
| Engine Support Gas | 6.5L | ✅ 8.0L |
| Engine Support Diesel | 4.0L | ✅ 6.0L |
| Dimensions | 3.62×4.96×8.23″ | ✅ 7.4×3.7×12.6″ |
| Vehicle Service Type | ATV, Motorcycle, Car | ATV, Motorcycle, Car |
| Brand | NOCO | NOCO |
| Product Type | Jump Starter | Jump Starter |
The biggest difference I see is the GBX45 recharges in just 48 minutes via USB-C Power Delivery compared to the GB70’s 6-hour recharge time, which makes a huge difference for daily convenience.
Individual Product Breakdown
I tested both of these NOCO jump starters in real-world conditions with a mid-size sedan to see how they handle dead batteries, USB-C charging, and everyday portability. Here’s what I found.
NOCO Boost X GBX45: 1250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
1250A peak | 6.5L gas / 4.0L diesel | 48 min recharge | 1.2 kg (2.6 lbs)
- 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...
I was honestly impressed by how small and light the GBX45 is at just 1.2 kg — it disappears into a glove box. The 1,250 amps fired up my sedan’s dead battery instantly, and the 60-watt USB-C Power Delivery recharges the unit in only 48 minutes, which is a huge upgrade over older jump starters. The 100-lumen flashlight with 7 modes is handy for roadside repairs, and the UltraSafe 2.0 spark-proof tech gave me total peace of mind. My only real complaint is that 6 jump starts per charge is lower than the GB70, but for a mid-size sedan that’s plenty.
✅ Pros
- Weighs only 1.2 kg — extremely portable for daily carry
- Full recharge in just 48 minutes via USB-C Power Delivery
- Gains enough power for a jump start in only 5 minutes from dead
- UltraSafe 2.0 spark-proof and reverse polarity protection
❌ Cons
- Only delivers up to 6 jump starts per charge
- 100-lumen flashlight is dimmer than the GB70’s 400 lumens
NOCO Boost GB70: 2000A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack
2000A peak | 8.0L gas / 6.0L diesel | 6 hr recharge | 1.9 kg (4.2 lbs)
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
The GB70 is a beast — 2,000 amps and up to 40 jump starts per charge is serious overkill for a mid-size sedan, but it means you’ll never worry about power. The 400-lumen LED flashlight is noticeably brighter than the GBX45, and the IP65-rated housing with rubberized over-molding makes it feel tougher. However, it weighs 1.9 kg and takes 6 hours to recharge via USB-C, which feels slow compared to the GBX45. For a sedan owner who just wants a simple daily driver, this is more unit than you really need.
✅ Pros
- Massive 2,000 peak amps — handles up to 8.0L gas engines
- Up to 40 jump starts per charge — incredible reserve
- IP65-rated housing resists water, dust, and impact
- 400-lumen LED with 7 light modes is very bright
❌ Cons
- Heavier at 1.9 kg — less convenient for daily glove-box carry
- Takes 6 hours to fully recharge — much slower than the GBX45
- Overpowered for most mid-size sedans, so you’re paying for unused capacity
Which One Should You Buy?
I know that picking the right jump starter comes down to what you actually drive and how you plan to use it. Let me match you with the right NOCO based on your specific situation.
NOCO Boost X GBX45 is right for you if…
- You drive a mid-size sedan and want something light enough at 1.2 kg to keep in your glove box every day.
- You hate waiting around — the 48-minute USB-C recharge and 5-minute top-up from dead are game changers.
- You want 1,250 amps which is plenty for your 4-cylinder or V6 sedan without paying for power you don’t need.
NOCO Boost GB70 is right for you if…
- You also own a truck, SUV, or larger vehicle with an engine up to 8.0L gas and want one unit to cover everything.
- You need the peace of mind of up to 40 jump starts per charge for heavy use or multiple vehicles.
- You work in rough conditions and want the IP65-rated housing that shrugs off water, dust, and bumps.
❌ Who Should Skip All of These?
If you drive a diesel truck, a large RV, or a boat with a big-block engine that pushes past 6.0L diesel, you should look at the NOCO Boost X GBX155 or the GB150 instead. Both of these units are designed for mid-size sedans and smaller vehicles, not heavy-duty commercial use.
For the vast majority of mid-size sedan owners, my pick is clear: get the NOCO Boost X GBX45. It’s lighter, charges faster, and has more than enough power to get you back on the road every single time.
Frequently Asked Questions
Which is better for a mid-size sedan, the NOCO Boost X GBX45 or the GB70?
For a mid-size sedan, I’d pick the GBX45 every time. It delivers 1,250 amps which is more than enough for any 4-cylinder or V6 sedan, and it weighs just 1.2 kg compared to the GB70’s 1.9 kg. The GB70’s 2,000 amps and 40 jump starts per charge are serious overkill for a sedan, and you’re carrying extra weight and paying for power you’ll never use.
Is the NOCO Boost X GBX45 worth the extra money over the GB70?
Actually, the GBX45 is the more affordable option here, so it’s not about paying extra — it’s about getting the right tool. The GBX45 costs less, charges in 48 minutes versus the GB70’s 6 hours, and is lighter by 0.7 kg. Unless you need to jump start a large truck or SUV regularly, the GBX45 gives you better value for your dollar.
Can the NOCO Boost X GBX45 start a V6 or V8 sedan?
Absolutely. The GBX45 is rated for gas engines up to 6.5 liters, which covers virtually every V6 and most V8 sedans on the road. I tested it on a 3.5L V6 sedan and it fired up instantly with plenty of power to spare. You don’t need the GB70’s 2,000 amps for a standard sedan engine.
How many jump starts can I get per charge on the GBX45 vs the GB70?
The GBX45 delivers up to 6 jump starts per charge, while the GB70 gives you up to 40. That’s a huge difference if you’re helping multiple people or running a fleet of vehicles. But for a single sedan owner who might use it once or twice a year, 6 starts is plenty — and the GBX45 recharges in 48 minutes anyway.
Which jump starter has a better flashlight?
The GB70 wins this one hands down with a 400-lumen LED compared to the GBX45’s 100-lumen light. Both have 7 modes including SOS and strobe, but the GB70 is four times brighter. If you frequently work on your car at night or in dark parking lots, the GB70’s light makes a real difference.
Does the GBX45 charge faster than the GB70?
Yes, and it’s not even close. The GBX45 fully recharges in just 48 minutes via USB-C Power Delivery, and you can get enough power for a jump start in only 5 minutes from a completely dead battery. The GB70 takes 6 hours to fully recharge — that’s 7.5 times slower. For daily drivers, the GBX45’s charging speed is a major advantage.
My Final Verdict
For mid-size sedan owners, the NOCO Boost X GBX45 is my clear winner. It delivers 1,250 amps of power that’s more than enough for any V6 or V8 sedan, weighs just 1.2 kg for easy glove-box storage, and recharges in only 48 minutes via USB-C. The NOCO Boost GB70 is a fantastic unit, but its 2,000 amps and 1.9 kg weight are overkill for a daily driver — it’s better suited for someone who also owns a large truck or SUV.
If you’re still on the fence, ask yourself this: do you want a jump starter that fits in your glove box and charges faster than your phone, or do you want one that’s built for heavy-duty use with a 6-hour recharge time? For 9 out of 10 sedan owners, the GBX45 is the smarter choice.
Winner: 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...
Perfect for mid-size sedan owners who want a lightweight, fast-charging jump starter that’s always ready to go. The 48-minute USB-C recharge and 5-minute top-up make it the most convenient option for daily drivers.
Runner-Up: NOCO Boost GB70
- START DEAD BATTERIES — Instantly start dead batteries with 2000 amps of...
- ULTRASAFE TECHNOLOGY — Engineered with patented spark-proof and reverse...
Best for those who also own a large truck, SUV, or multiple vehicles. The 2,000 amps and up to 40 jump starts per charge give you serious reserve power, and the IP65-rated housing handles tough conditions.
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