In-depth review
NOCO Boost HD GB70 Review (2027)
In-depth research review of the NOCO Boost HD GB70: 2000-amp power, diesel coverage, and who should buy it.
Our verdict
The NOCO Boost HD GB70 is the best heavy-duty portable jump starter in 2027. Its 2000 peak amps start gas engines to 8.0L and diesels to 6.0L, the 56 watt-hour capacity runs accessories longer, and the full NOCO safety suite carries over from the GB40. The trade-offs are size, weight, and price that are overkill for a compact car. For truck and diesel owners, it is the right tool.
What we like
- 2000 peak amps handle gas engines up to 8.0L and diesels up to 6.0L
- Same spark-proof safety system as the GB40
- 56 watt-hours of capacity runs accessories longer
- Rugged housing built for shop and trunk abuse
What to watch out for
- Heavier and bulkier than compact models
- Overkill for a 4-cylinder commuter car
- Premium price
What owners report: NOCO Boost HD GB70
Synthesized from recurring themes in long-term owner feedback.
Most praised
- Double the output of the smaller sibling gives diesel and large gas engines real margin in winter
- Extra capacity means more start attempts before the pack itself runs low
- The rugged case shrugs off being knocked around in a trunk or truck bed
Common complaints
- Bulk and weight are more than a small car owner wants to move between vehicles
- It is overkill and overspend for a four cylinder commuter
- Truck owners still need to keep it charged, and its size makes it easier to leave in the garage
Who it is for
Full-size truck, large SUV, and diesel owners, plus anyone who tows or runs equipment that needs serious cranking power.
2000 amps of headroom
2000 peak amps is double the GB40 and lands in the range that starts 8.0L gas and 6.0L diesel engines with margin to spare. That margin matters: a pack running near its limit in cold weather can fail where a pack with headroom succeeds. The 56 watt-hour battery also means more start attempts per charge.
Safety and build
The GB70 carries the same spark-proof and reverse-polarity protection as its smaller sibling, scaled to higher current with heavier clamps and cables. The housing is built for trunk and shop environments where it will get knocked around.
Size and value
This is not a glove-box unit; it is a trunk unit. For a 4-cylinder commuter it is unnecessary weight and money. For a diesel truck it is cheap insurance against a no-start 50 miles from help, which reframes the premium price quickly.
Key specifications
- Peak current
- 2000 amps
- Gas engines
- Up to 8.0L
- Diesel engines
- Up to 6.0L
- Battery capacity
- 56 watt-hours
- Safety
- Spark-proof, reverse-polarity protection
Also consider
Hulkman Alpha85
2000 amps with a driver-friendly display.
Why consider it: Same 2000-amp class with a smart display and 65W fast charging.
- Peak current: 2000 amps
- Gas engines: Up to 8.5L
NOCO Boost Plus GB40
The benchmark 1000-amp jump starter.
Why consider it: Half the power at a lower price if your engine fits its ratings.
- Peak current: 1000 amps
- Gas engines: Up to 6.0L
Research-based assessment. TrueGear has not hands-on tested this product; this evaluation synthesizes manufacturer specifications, retailer documentation, and published expert reviews.
Questions, answered
Will the GB70 start a 6.7L diesel?
It is rated to 6.0L diesel. Larger diesels may need it plus good technique, or a shop-grade unit like the JNC660 for sustained cranking.
Is it too big for a car trunk?
No, it fits a trunk easily. It is simply larger and heavier than compact 1000-amp packs.
How many jumps per charge?
NOCO rates it for dozens of starts on typical engines; real counts vary with engine size and temperature.