NOCO Boost Plus vs Buture BR300 (2026): Head-to-Head

Two compact lithium jump packs, two very different paper trails. The NOCO Boost Plus GB40 is the documented glovebox standard: 1,000 peak amps on NOCO’s rating, a published IP65 housing, a manual override for batteries below 2 volts, and a deep owner record behind the Boost line. The Buture BR300 is the value challenger: a 13,800mAh pack with fast USB-C charging, a 4-mode LED and — on Buture’s own store — ratings to 7.0L gas and 5.5L diesel that clear the GB40’s 6.0L and 3.0L. Buture also publishes a second, larger set of numbers on its Amazon listing, and this head-to-head prints both sets side by side, flags every conflict, and routes its finder on the lower, official-store figures. For the wider field, start with our pillar guide to the best portable jump starter and the six-model brand comparison, NOCO vs GOOLOO.

One warning before the tables: peak-amp numbers are not cross-comparable between brands — there is no shared test standard behind them — and the BR300 is the proof, because Buture itself prints 1,500A in its store and 3,500A on the Amazon listing for the same model. The honest comparison runs on engine-litre ratings, starts per charge, charging inputs and temperature limits. Those are the figures our portable jump starters archive and jump starter comparisons use across the whole category, and they are the figures the finder below routes on.

Quick compare — the two packs on the makers’ own published facts. The BR300 carries two published figure sets; the table prints both and routes on the official-store set. Peak amps are each maker’s own claim and are not cross-comparable.

How to choose between NOCO and Buture

Engine rating first — litres, not peak amps

Route on the makers’ litre ratings, because those are the claims each maker ties to its own pack: GB40 to 6.0L gas and 3.0L diesel, BR300 to 7.0L gas and 5.5L diesel on Buture’s official store. The peak-amp row is unusable twice over here — no shared standard sits behind any brand’s figure, and Buture prints two different ones (1,500A store, 3,500A Amazon) for this single model. If your engine fits inside both litre ratings, the rows below decide; if it fits only the BR300’s, the choice is already made.

Diesel is the widest honest gap

The diesel ratings are 3.0L against 5.5L on the conservative figures — the largest separator in this comparison that both makers’ own stores support. A diesel’s compression and glow-plug load are why the GB40’s compact case stops early. Small car diesels are covered by either pack; a diesel SUV or a mid-size diesel pickup is BR300 territory, and diesels beyond 5.5L belong to the bigger packs in the pillar guide, whatever the BR300’s Amazon listing claims.

Charging speed and ports: micro-USB vs USB-C

The GB40 charges over micro-USB at 5V/2.1A and gives the same back out — fine overnight, slow in a hurry, and one more legacy cable to keep. The BR300 takes USB-C input up to 12V/1.5A — Buture’s boosted 18W fast charging, a full recharge in about 4 hours on its store’s figures — and offers a Quick Charge output alongside a 5V/2.1A port. If the pack doubles as your travel power bank, the BR300’s port set is a generation ahead.

Cold behaviour and the flat-battery case

NOCO publishes -20°C to +50°C for the GB40, and Buture publishes -20°C to 60°C for the BR300, so the BR300 wins the temperature row on paper. The flat-battery case separates them instead. NOCO documents a manual override for batteries below 2 volts. Buture documents no force-start or override mode for the BR300 in the store, listing or manual we checked — its smart clamps carry 10 protections, but a battery too flat to detect is the GB40’s documented home ground.

Size, sealing and documentation

NOCO publishes an IP65 housing and two weights (1.65 lb bare, 2.4 lb with clamps). Buture publishes an ABS shockproof cover — a claim, not an IP rating — and two conflicting weights: 0.97 lb in its store spec table, 1.74 lb in the Amazon item details for this ASIN. Neither Buture figure can be confirmed over the other from the sources, so both are printed. If verified documentation is what you are paying for, the GB40 is the stronger file by a wide margin.

Warranty: 1 year documented vs a longer, messier promise

NOCO’s 1-year limited warranty sits in the Amazon item details for the GB40’s ASIN. Buture’s own store offers 1 year on the BR300, extendable to 3 years with registration, while an older BR300 manual states 24 months — a longer promise, published inconsistently. We print both Buture terms exactly as sourced, flag the conflict, and let you decide how much weight a warranty row deserves against the spec rows above.

Which engines each pack covers

Each row is routed on the makers’ own litre ratings, using Buture’s lower official-store set for the BR300. A pack is only recommended inside its rating.

NOCO vs Buture by budget

No prices appear in this guide by policy; check the live listing on each button. The budget question here is not which pack costs less today — promotions move, and the BR300 is sold on Amazon by third-party sellers whose offers change — but which set of ratings and documents you are buying.

Types of jump starter, compared

Both packs in this head-to-head are lithium; the lead-acid and combo rows are covered with their own picks in our pillar guide to the best portable jump starter and in the jump starter comparisons archive.

Detailed reviews

Each pack is judged on its maker’s own published specifications for the exact ASIN linked: ratings, starts, charging, temperature limits and warranty. Owner sections paraphrase real reports and link them; where coverage is thin or figures conflict, the block says so.

Best Compact: NOCO Boost Plus GB40

Compact pick

Why the NOCO Boost Plus GB40 is our pick

The GB40 is the pack the other compact in any comparison has to beat on trust. NOCO documents it completely — sell sheet, manual, IP65 housing, unit and with-clamps weights — rates it honestly for the cars most people own, and gives it the feature that matters on the worst morning: a manual override for a battery too flat for smart clamps to recognise. Its operating floor matches the BR300’s on paper, and unlike its rival, every figure in its file comes from one consistent set of maker documents. It is also genuinely small: 1.65 lb bare is a glovebox pack, not a trunk commitment.

NOCO Boost Plus GB40 key specs

• Part number: GB40
• Peak current: 1,000A (NOCO rating)
• Engine ratings: gas up to 6.0L, diesel up to 3.0L (NOCO)
• Jump starts per charge: up to 20 (NOCO)
• Internal battery: 24 Wh lithium-ion (NOCO sell sheet)
• Charging input: Micro-USB 5V/2.1A
• USB output: 5V/2.1A
• LED: 100 lumens, 7 modes
• Housing: IP65 with ports closed; operating -20°C to +50°C
• Weight: 1.65 lb unit, 2.4 lb with clamps; 6.7 x 3.2 x 1.7 in
• Warranty: 1-year limited (Amazon item details)

NOCO Boost Plus GB40: fits and best for

The car and small-SUV pack in this comparison: sedans, crossovers and small diesels inside NOCO’s 6.0L gas / 3.0L diesel ratings, motorcycles and powersports alongside them. It is the finder’s answer whenever the engine fits and the priority is the smallest documented pack. Battery care around it is the same discipline as our winch battery guide and battery drain guide teach: a healthy vehicle battery needs the pack rarely.

NOCO Boost Plus GB40 pros and watch-outs

NOCO Boost Plus GB40: what owners report

NOCO Boost Plus GB40: who should not buy

Skip it for any diesel beyond 3.0L and for gas engines beyond 6.0L — NOCO does not rate it there and neither do we. The covered upgrade inside this comparison is the Buture BR300 — rated on its maker’s store figures to 7.0L gas and 5.5L diesel.

NOCO Boost Plus GB40: pair it with

Pair it with the NOCO GBC013 EVA protection case, made for the GB20 and GB40: a glovebox pack earns its keep un-scuffed, with its clamps and cable kept together instead of loose in the compartment.

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We may earn a commission at no cost to you. Listing shown for the NOCO Boost Plus GB40, ASIN B015TKUPIC — confirm the part number on the listing before ordering.

Best Maker Ratings: Buture BR300

Ratings pick

Why the Buture BR300 is our pick

The BR300 is the pack for the engines the GB40 cannot claim — read on Buture’s own store figures, the conservative set. The store rates it to 7.0L gas and 5.5L diesel, lists the same up-to-20 starts per charge as the GB40, and builds in the modern kit: 18W USB-C fast charging in, a Quick Charge output beside a 5V/2.1A port, a 4-mode LED, smart clamps with 10 protections and a 1,000-plus cycle life in its manual. Its Amazon listing claims still more — 3,500A, 8.0L gas, 7.0L diesel — and we print those claims as a conflict rather than routing on them, which is exactly how a value pack should be bought: on the figures its maker stands behind in its own store.

Buture BR300 key specs

• Part number: BR300 (Amazon item details)
• Peak current: 1,500A (official store) / 3,500A (Amazon listing) — conflict
• Engine ratings: gas up to 7.0L, diesel up to 5.5L (official store); Amazon listing claims 8.0L / 7.0L — conflict
• Jump starts per charge: up to 20 (official store and manual agree)
• Capacity: 13,800mAh / 51.06 Wh lithium polymer (official store)
• Charging input: USB-C 5V/2A, 9V/2A, 12V/1.5A (18W); full recharge about 4 hours (store)
• USB outputs: Quick Charge (5V/2.4A, 9V/2A, 12V/1.5A) + 5V/2.1A
• DC output: Not published
• LED: 4 modes — lighting, SOS, strobe, warning (lumens not published)
• Operating range: -20°C to 60°C (store and manual agree)
• Protections: 10 smart-clamp protections (manual); cycle life 1,000+ (manual)
• Weight: 0.97 lb (store spec table) / 1.74 lb (Amazon item details) — conflict; 3.03 x 5.3 x 8.8 in (Amazon item details)
• Warranty: 1 year, extendable to 3 years on registration (store); an older manual states 24 months — conflict

Buture BR300: fits and best for

The bigger-engine pack in this comparison: gas engines to 7.0L and diesels to 5.5L on the store ratings, two-vehicle households that want one pack to cover the car and the diesel SUV, and drivers who use the pack as a fast-charge travel power bank between emergencies. Its manual asks for a healthy charge before a start — 75 percent or better for best results — and a top-up every 3 to 6 months. For the broader field it sits in, see the jump starter comparisons archive, where this head-to-head lives.

Buture BR300 pros and watch-outs

Buture BR300: what owners report

Buture BR300: who should not buy

Skip it if you need a published IP rating, a documented override for totally flat batteries, or a single consistent set of maker figures you can audit line by line — the NOCO Boost Plus GB40 is the documented pack, inside its smaller ratings.

Buture BR300: pair it with

Pair it with a NOCO GENIUS5 maintainer on the vehicle itself: the cheapest jump start is the battery that never goes flat, and the GENIUS5 is a 5A 6V/12V charger, maintainer and desulfator for lead-acid and lithium vehicle batteries.

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We may earn a commission at no cost to you. Listing shown for the Buture BR300, ASIN B0D5BGH9C9 — confirm the model number BR300 on the listing before ordering; Buture sells larger Beta-series packs under other model names, and earlier BR300-1 revisions carry different figures.

Spec comparison

Every figure is the maker’s published figure for the exact ASIN here. Where a maker publishes nothing, the cell says so; where Buture’s own sources conflict, both figures are printed and the official-store set is the one this guide routes on.

Using and jump-starting basics

Both packs follow the same safe sequence, and both protect you while you follow it: the GB40 with NOCO’s spark-proof, reverse-polarity UltraSafe clamps, the BR300 with smart clamps carrying 10 protections and an indicator that shows the connection state. Connect the clamp plug to the pack, positive to the dead battery’s positive terminal, negative to the negative terminal or an unpainted engine ground away from the battery, and wait for the clamp indicator to show ready. The BR300’s manual is specific about the attempt itself: crank for no more than 3 seconds, wait 30 seconds between attempts, and use the pack at 75 percent charge or better for best results. The GB40 adds one documented escape hatch the BR300 does not publish: a manual override when the battery is too flat — under 2 volts — for its clamps to detect.

Once the engine runs, remove the clamps promptly and in reverse order, drive long enough to recharge the vehicle battery properly, and then recharge the pack itself the same day. A pack that starts a car with a failing alternator or a parasitic drain will be needed again tomorrow — diagnose the cause with the same method as our amp draw guide and battery drain guide, and keep the vehicle on a maintainer if it sits, as our battery guide recommends.

Safety essentials

Three companions from this site’s verified pool pair with either pack; the full kit list lives in our accessories hub:

NOCO GBC013 EVA protection case — made for the GB20 and GB40; keeps the compact pick, its clamps and cable together in the glovebox.

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NOCO GENIUS5 battery maintainer — a 5A smart charger and maintainer for the vehicle battery itself, so the pack stays an emergency tool instead of a weekly routine.

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Energizer jumper cables, 16-foot 6-gauge — the donor-vehicle backup for the day a pack is flat too; cables never self-discharge on the shelf.

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Build the rest of the kit from our essential accessories guide, not at the roadside.

Troubleshooting

Who should NOT buy these

Your diesel is bigger than 5.5L, or your gas engine is bigger than 7.0L. On the conservative, official-store figures neither maker rates its pack there, and an out-of-rating start is a hope, not a plan. The larger lithium packs and the lead-acid shop box in our pillar guide are the honest route.

You run a shop, a yard or a roadside service. Two lithium glovebox-class packs are not a repeated-starts tool. A lead-acid box with a big reserve battery, kept on its charger, is the category built for your day — it is covered in the pillar guide.

You want one tool that also inflates tyres. Neither pack here has a compressor, and neither publishes a DC output to run a separate inflator. The combo type is compared in our jump starter comparisons.

You will never recharge anything. Both packs are lithium tools with storage habits: top-ups every few months and a recharge after use, with the BR300’s manual asking for a 75 percent charge floor before a start. If that routine will not happen, a maintained vehicle battery plus a set of cables (Block 17) is the more honest kit for you.

Final verdict

Best compact — NOCO Boost Plus GB40: the documented, IP65, override-equipped glovebox pack for cars and diesels to 3.0L. Check its price.

Best maker ratings — Buture BR300: 7.0L gas and 5.5L diesel store ratings, fast USB-C charging and a 51.06 Wh cell for bigger engines, bought with its conflicts in plain sight. Check its price.

Engines beyond both conservative ratings: step up to the larger packs in our pillar guide to the best portable jump starter rather than stretching either pack past the figures its maker publishes in its own store.

FAQ

NOCO Boost Plus vs Buture BR300: which is better?

Better depends on your engine and your priorities. The Buture BR300 carries the wider conservative maker ratings — 7.0L gas and 5.5L diesel from Buture’s own store against the GB40’s 6.0L and 3.0L — and far faster charging. The NOCO Boost Plus GB40 is documented far more completely, carries a published IP65 rating, and offers a manual override the BR300 does not document. Inside both ratings, choose on size and paperwork; beyond the GB40’s ratings, the BR300 is the only covered choice.

Is the Buture BR300 a 1,500A or a 3,500A jump starter?

Buture publishes both numbers for the same model: 1,500A on its official store page, 3,500A on the Amazon listing for this ASIN and in the manual published for that listing. Peak-amp figures have no shared test standard anyway, so we print the conflict and route this guide on the litre ratings from the official store instead — the set we would rather over-deliver against than over-claim with.

Which jump starter is better for a diesel?

The Buture BR300, on conservative ratings: Buture’s store rates it for diesels up to 5.5L, which covers diesel SUVs and mid-size diesel pickups, while NOCO rates the GB40 to 3.0L diesel — small car diesels only. Diesel cranking is the hardest work a pack does, so staying inside the maker rating matters more here than anywhere else in this comparison. Beyond 5.5L, step up to the larger packs in the pillar guide.

Can either pack start a completely flat battery?

The GB40 is documented for exactly that case: NOCO gives it a manual override for batteries below 2 volts, the level at which smart clamps can no longer detect a battery. Buture documents no force-start or override mode for the BR300 in its store, listing or the manual for this ASIN, so a totally flat battery is the scenario where the NOCO’s paperwork wins outright. Overrides bypass detection protection, so connect carefully either way.

How many starts does each pack give per charge?

Both makers claim up to 20 starts per charge: NOCO for the GB40, and Buture for the BR300 in both its store copy and its manual — a rare point of agreement in the BR300’s paper trail. Treat both as best-case maker figures with small engines and a healthy, well-charged pack; real counts fall with engine size, cold and battery condition, and the BR300’s manual asks for 75 percent charge or better before a start.

Which charges faster, the GB40 or the BR300?

The BR300, clearly. It takes USB-C input up to 12V/1.5A — Buture’s 18W fast charging, a full recharge in about 4 hours on the store’s figures — and offers a Quick Charge output. The GB40 charges over micro-USB at 5V/2.1A and returns the same: an overnight pack, not a quick-turnaround one. If the pack doubles as your travel power bank, this row decides it.

Is the Buture BR300 waterproof?

Buture describes an ABS shockproof cover for the BR300 but publishes no IP rating in its store, listing or manual, so our tables print that honestly. The GB40 carries a published IP65 rating with its ports closed. If the pack will live somewhere wet or dusty, the NOCO’s rated housing is the safer evidence.

Which has the better warranty?

It depends which Buture document you read — which is the point. Buture’s store offers 1 year on the BR300, extendable to 3 years with registration; an older BR300 manual states 24 months. NOCO’s 1-year limited term for the GB40 sits plainly in its Amazon item details. The BR300’s ceiling is longer; the GB40’s term is the one published consistently. We print all three figures as sourced.

Why does this guide use the BR300’s lower ratings?

Because a buying guide should route readers on the figures a maker publishes in its own store, not on the larger set printed by a marketplace listing sold through third-party sellers. Buture’s store rates the BR300 at 7.0L gas and 5.5L diesel; its Amazon listing claims 8.0L and 7.0L. Both sets are printed throughout this guide, the conflict is named every time, and the finder deliberately works to the lower set.

Sources & changelog

Manufacturer and listing sources, and the owner sources paraphrased above:

• NOCO Boost Plus GB40 — Amazon item details: part GB40, warranty (NOCO)
• NOCO GB40 sell sheet: 24 Wh, weights, temperature range (NOCO)
• Buture BR300 — Amazon listing opened directly: model BR300, 3,500A claim, dimensions, weight (Buture VAC)
• Buture BR300 — official store: 1,500A, 7.0L / 5.5L ratings, ports, warranty terms (Buture)
• Buture BR300 — user manual for this ASIN: protections, crank discipline, maintenance (Buture)
• NOCO GBC013 case — Amazon listing: fits GB20 and GB40 (NOCO)
• NOCO GENIUS5 maintainer — Amazon listing (NOCO)
• Energizer jumper cables ENB-616U — Amazon listing (Energizer)
• Bogleheads — owners: GB40 use, override and winter storage
• HDForums — owners: GB40 across cars, truck and motorcycle
• AR15.com — owners: NOCO storage top-ups and cold behaviour
• BobIsTheOilGuy — owners: high-output packs and repeated starts
• AutoGuide — garage notes on value-pack reserve

Changelog — October 18, 2026: guide first published.

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