Exploring
For most vehicles, the NOCO Boost GB40 is the best jump starter — 1,000A, spark-proof, and the category benchmark. The NOCO Boost GB70 is the best heavy-duty pick for trucks and tractors, and the GOOLOO GT4000S is the best value with 4,000A and 100W fast charging.
How We Picked
We compared portable jump starters on peak amps, safety protections (spark-proof clamps, reverse-polarity), how long they hold a charge in storage, and extras like USB power and built-in lights. A jump starter rescues a dead starting battery — to stop killing batteries in the first place, see our deep cycle battery guide.
1. Best Overall: NOCO Boost GB40 1,000A UltraSafe Lithium Jump Starter
NOCO Boost GB40 1,000A UltraSafe Lithium Jump Starter
NOCO
- 1,000A starts gas engines up to 6L
- Spark-proof, reverse-polarity protected
- Holds charge for months in the glovebox
- USB out powers phones, built-in flashlight
- 4.6★ from 100,000+ owners
Why we picked it: The GB40 is the benchmark battery jump starter — 1,000 amps starts gas engines up to 6 liters and diesels to 3, with spark-proof clamps that make it nearly impossible to hook up wrong. It holds a charge for months, doubles as a USB power bank, and has more five-star history than anything else in the category. The best portable jump starter for most drivers.
2. Best Heavy-Duty: NOCO Boost GB70 2,000A UltraSafe Lithium Jump Starter
NOCO Boost GB70 2,000A UltraSafe Lithium Jump Starter
NOCO
- 2,000A for trucks, tractors, and V8s
- Starts gas engines to 8L, diesels to 6L
- 12V out runs tire inflators and gear
- 400-lumen flashlight with SOS mode
- 4.7★ heavy-equipment favorite
Why we picked it: Homesteads run bigger iron — pickups, tractors, skid steers — and the GB70's 2,000 amps starts gas engines to 8 liters and diesels to 6. The 12V output port runs a tire inflator or other DC gear in the field, and the 400-lumen light earns its keep in a dark equipment shed. The best jump starter for trucks and farm equipment.
3. Best Value: GOOLOO GT4000S 4,000A Jump Starter with 100W Fast Charging
GOOLOO GT4000S 4,000A Jump Starter with 100W Fast Charging
GOOLOO
- 4,000 peak amps at a budget price
- 100W two-way fast charging
- Jumps 12V gas and diesel engines
- Doubles as a big USB power bank
- 4.6★ from 2,600+ owners
Why we picked it: The GT4000S stacks 4,000 peak amps and 100W two-way fast charging into a package that undercuts the premium brands — it jump starts nearly any 12V gas or diesel engine and recharges itself (or your laptop) in about an hour. For maximum cranking power per dollar, it's the best value car jump starter.
Comparison Table
| Pick | Jump starter | Peak amps | Starts up to | Best for |
|---|---|---|---|---|
| Best Overall | NOCO Boost GB40 | 1,000A | 6L gas / 3L diesel | Cars & SUVs |
| Best Heavy-Duty | NOCO Boost GB70 | 2,000A | 8L gas / 6L diesel | Trucks & tractors |
| Best Value | GOOLOO GT4000S | 4,000A | Most 12V engines | Budget power |
What to Look For in Jump Starters
Peak amps vs your engine. Small gas engines start on 400–800A; full-size trucks and diesels want 1,500A+. Peak-amp ratings vary by brand, so engine-size ratings (e.g. "up to 6L gas") are the more honest spec to match.
Safety protections. Spark-proof clamps and reverse-polarity protection are non-negotiable — they're what makes a lithium jump starter safe for non-mechanics. All three picks have both.
Standby time. A jump starter only helps if it's charged when stranded. Quality lithium packs hold 80%+ for months; top yours off every 3–6 months and after every use.
Useful extras. USB ports turn the pack into an emergency power bank, a flashlight helps at night, and a 12V output can run an air compressor — worth having, but cranking power and safety come first.
Bottom Line: Which Should You Buy?
For most vehicles: the NOCO Boost GB40. The proven glovebox standard.
For trucks & tractors: the NOCO Boost GB70. 2,000A with a 12V gear port.
On a budget: the GOOLOO GT4000S. Max amps per dollar.
Ready to buy?
Jump straight to our top picks on Amazon — prices shown at click-through.
Frequently Asked Questions
What is the best jump starter in 2026?
The NOCO GB40 is our best overall pick for 2026. The NOCO GB70 and the GOOLOO GT4000S cover the other cases this guide compares. See the comparison table below for specifications and owner ratings, then choose the one that matches your setup.
What size jump starter do I need?
Match the engine, not the marketing number: 1,000A covers gas engines to about 6 liters, while full-size trucks, V8s, and diesels deserve 2,000A or more. When in doubt, size up — extra amps never hurt a smaller engine.
How long does a jump starter hold its charge?
Quality lithium jump starters hold a usable charge for 3–6 months in standby, though heat and cold shorten that. Make it a habit to recharge after every use and top off quarterly so it's ready when the battery isn't.
Can a jump starter charge my phone or other devices?
Yes — all three picks double as USB power banks, and the GB70 adds a 12V output for tire inflators and DC gear. Off-grid, a charged jump starter is effectively a small backup power station that can also start your truck.
Is a jump starter better than jumper cables?
For most people, yes: no second vehicle needed, no long cables across two engine bays, and spark-proof clamps remove the classic hookup mistakes. Cables still belong in the kit as a zero-battery backup, but the jump starter is what you'll actually use.
Do I need a jump starter with an air compressor?
A jump starter with air compressor built in is convenient for slow leaks, but combo units compromise on one job or the other. We'd rather carry a dedicated 12V inflator — powered, if you like, from the GB70's 12V port.
Related Guides
How We Research
Picks are based on manufacturer specifications, current Amazon availability, and patterns across verified owner reviews. Peak-amp ratings and engine-size guidance vary by listing — confirm current details at the retailer before buying.
Safety note: Connect the red clamp to battery positive and the black clamp to a grounded metal point (not the negative post directly when possible), keep packs out of extreme heat, and recharge after every use. Never attempt to jump a visibly damaged, leaking, or frozen battery.