The NOCO Boost HD GB70 is pitched at owners who need more than a standard jump starter can give — 2000 peak amps for diesel trucks, big gas engines, boats, and equipment. But the owner data ClearPick has verified so far is thin, just 8 mentions, and it skews mixed-to-negative rather than confirming the confident cold-weather success story older reviews describe. Most of that verified chatter doesn't come from truck owners at all — it comes from generator and snowblower owners troubleshooting whether the GB70 will work on their equipment, including one reviewer who summed up the Amazon reviews as a coin flip. The smaller, cheaper NOCO Boost Plus GB40 has both more verified mentions and a noticeably more positive sentiment split, which complicates the case for stepping up to the GB70 unless the extra amperage is genuinely needed.
What owners actually get
On paper the GB70 delivers what large-engine owners need: 2000 peak amps, UltraSafe spark-proof clamps that block current if the leads are connected wrong, a 2.3 lb body that fits in a glovebox where an 18 lb lead-acid pack cannot, and USB-C PD recharging from any laptop or phone charger. The one clearly positive mention ClearPick has verified for the GB70 fits that promise: an owner in r/Generator reports calling NOCO directly and getting confirmation the unit would work fine with their generator before buying. That's the pattern running through the GB70's mention set generally — owners checking compatibility for generators, snowblowers, and mowers, not owners recounting a truck jump-start.
The GB40, NOCO's smaller 1000-amp sibling, has a much stronger verified track record: 9 of its 13 mentions are positive. Owners describe it as a glovebox staple kept charged for months, used to jump-start strangers' cars, and in one r/VEDC thread, credited with successfully starting a diesel engine in winter despite being the lower-amperage model. One owner in r/Ioniq5 called owning one "like insurance," a comment that captures how the GB40's owner base talks about it — as a low-drama, install-and-forget purchase rather than a device they're still testing.
The complaint pattern
The GB70's verified sentiment split is 4 negative, 3 mixed, and 1 positive out of 8 mentions — a small sample, but one that leans negative rather than confirming the confident diesel-truck narrative built around this product elsewhere. The clearest complaint is reliability uncertainty itself: one r/VEDC commenter says they passed on the GB70 because Amazon reviews put it at "a 50/50 of it working." A second recurring theme is compatibility confusion — an r/Snowblowers thread shows a buyer unsure whether their equipment needed AC or DC output, a distinction the product listing doesn't make obvious. NOCO's own documented cons echo this: lithium performance drops below − 20°C and needs to be warmed before use, and the 2000 peak-amp lithium rating isn't directly comparable to lead-acid peak amps, so sustained cranking is shorter-duration than the number implies. Several owners in the mention set describe falling back on jumper cables and a second vehicle, or a shot of starting fluid before a pull-start, rather than trusting the booster outright.
The GB40 isn't complaint-free either, and its failures show the same cold-weather ceiling applies to the smaller model. One r/VEDC owner with a Subaru Forester reports that at about 2°F, "the engine just wouldn't quite turn over, and after 3 attempts, the Noco's charge was depleted." Another owner trying to start a Jeep Liberty's 3.7L engine got no response on the first attempt and needed an overnight indoor charge before the unit worked. Cold storage, not raw amperage, is the thread connecting most of the negative reports on both products.
Who It’s For
The extra capacity over the GB40 is real and necessary for large-displacement engines and generators — but verify compatibility with NOCO support first and store it warm, since the current mention set is thin and skews mixed-to-negative.
See review →
More verified mentions, a clearly more positive sentiment split, and $50 less — owners describe it as a glovebox staple they forget about until they need it.
See review →What owners actually say
What buyers love
“I talked to NOCO today and they confirmed it would work fine with this generator.”
r/Generator
“Same. My Noco will successfully start a diesel in winter, way more power is required for that than a Forester.”
r/VEDC
Common complaints
50/50 reliability from reviews
I've also looked at the NOCO but what sticks out to me is that you get a 50/50 of it working apparently from the reviews off amazon.
r/VEDCAC/DC compatibility confusion
Are we supposed to know by "Ariens Pro 28" whether your electric starter is AC or DC? Hint: I'd say 9 out of 10 snowblowers (or more) that have electric starters are going to need AC, so the answer is likely no.
r/SnowblowersDidn't crank a cold Forester
the engine just wouldn't quite turn over, and after 3 attempts, the Noco's charge was depleted.
r/VEDCThe case for the GB70 hasn't disappeared — 2000 peak amps and UltraSafe clamps are genuinely useful for diesel trucks, large gas engines, and generators the GB40 can't reliably start — but the verified owner-mention sample ClearPick has so far doesn't support the confident, vehicle-specific success story built around this product elsewhere. Most of the 8 verified mentions come from generator and snowblower owners checking compatibility, not truck owners recounting a cold start, and the split leans mixed-to-negative rather than positive. Buy the GB70 if you specifically need the amperage, confirm compatibility with NOCO support before purchase for anything unusual, and keep it stored warm rather than in a cold trunk. If your vehicle is a standard car or compact SUV, the GB40's stronger and more positive mention record makes it the safer buy at $50 less — treat the GB70 as a specialist tool for large equipment, not a default upgrade.