New: 60+ camping gifts, from 395 nights outside.Gifts for campers: 60+ picks from 395 nights outside.Still shopping? 60+ camping gifts, sorted by budget.
NOCO

NOCO Boost XL GB50 UltraSafe Lithium Jump Starter

Compiled from published reviews and manufacturer specs
Our Pick - Also Great
NOCO Boost XL GB50 UltraSafe Lithium Jump Starter
Click to expand
Share this gear
Best for:
Truck/SUV owners, RV and boat users, car-campers and anyone needing a reliable, spark-proof jump starter and emergency power bank in cold or remote conditions
Skip it if you want:
Small commuter-car drivers on a tight budget or fleets/very large diesels that require >4.5 L diesel or higher continuous output

Main tradeoff: Relatively expensive compared with bare-bones jump packs

Check price at Amazon

We may earn a commission when you buy through these links, at no cost to you. It never changes what we recommend. As an Amazon associate, Outdoorithm earns from qualifying purchases.

Before you buy

Why it works

  • Very high cranking power (1500 A peak) capable of starting large gasoline engines (~7.0 L) and moderate diesels (~4.5 L)Published reviews
  • UltraSafe electronics: spark-proof clamps and reverse-polarity protection reduce user risk during hookupPublished reviews
  • Built-in 200-lumen LED light with SOS/strobe modes and a USB power bank for phone chargingLeadfoot Automotive
  • Rugged, weather-resistant construction (rubber over-molded casing, IP65 rating) for use in rain, dust and garage storageTechGearLab

Tradeoffs

  • Relatively expensive compared with bare-bones jump packsLeadfoot Automotive
  • Real-world repeat-start count is lower than the advertised 'up to 30' (practical results closer to ~10–15 starts depending on conditions)Leadfoot Automotive
  • Clamps can be stiff and jumper cables are relatively short, which may impede access to battery posts in some vehiclesCar, Driver
  • USB-C port is input-only; there is no USB-C output for charging modern devicesManufacturer

Details

About the NOCO Boost XL GB50 UltraSafe Lithium Jump Starter

The NOCO Boost XL GB50 is the step-up sibling to the GB40, delivering 1,500 peak amps — enough cranking margin for the largest gas V8s (up to 7.0L) and diesel engines up to 4.5L, plus a meaningful performance buffer when temperatures drop below freezing at the campsite. It uses the same proven UltraSafe design with spark-proof clamps and reverse-polarity protection, so there is no risk of misconnection. The GB50 doubles as a USB power bank and 200-lumen LED flashlight, making it a practical dead-battery backstop on remote trips. One maintenance note: recharge roughly every 6 months during storage — a self-discharged pack is the most common failure mode for any lithium jump starter.

Specifications
Weight
2.7 lb (43 oz)
Packed size
8.6 x 3.4 x 3.2 inches
Capacity
up to 7.0 L gasoline / up to 4.5 L diesel (vehicle starting capability)
Temperature rating
-4°F to +140°F (operational range cited by manufacturer)
Materials
Polycarbonate/plastic housing with rubberized over-mold; heavy-duty clamps/cables
Changes from the last model
Boost XL variant consolidated higher 1500 A output; no major year-to-year changes called out for current GB50 Boost XL
Questions (6)
Is it worth the price over cheaper alternatives?
For frequent users or owners of trucks/RVs/boats, the GB50's higher peak amps, UltraSafe electronics and rugged IP65 construction justify the premium; frugal buyers with only a small commuter car may prefer a lower-amp, cheaper unit.
How does it hold up long-term?
Owners report years of reliable use when the pack is recharged periodically; the main longevity issue is lithium self-discharge if left stored uncharged for many months.
What vehicle size can it start?
NOCO rates the GB50 for gasoline engines up to about 7.0 L and diesel engines up to about 4.5 L; it supports 12 V lead-acid systems only.
Can it handle cold-weather starting?
Yes — the unit has cold-start safeguards and will operate in below-freezing temps (manufacturer cites down to about -4°F), but repeat-start capacity declines in very cold conditions and pre-warming or storing inside the vehicle may help.
How do I maintain it during storage?
Recharge the battery every 3–6 months, store it dry and avoid leaving it in extremely hot environments; keep clamp terminals clean.
What's included in the box and what ports are available?
The GB50 ships with heavy-duty clamps/cables, a USB-A output for charging devices and a USB-C input for charging the pack; note the USB-C is input-only and not a power output on this model.
Care and warranty

Care

  • Recharge every 3–6 months during storage
  • Store dry and out of direct sun to avoid long-term heat damage
  • Keep clamp terminals clean

What tends to wear out

  • Self-discharge if left stored uncharged for many months
  • Occasional reports of stiff clamps or rare faulty buttons

Durability

  • Many owners report years of trouble-free use when the unit is recharged periodically
  • Primary longevity issue is lithium self-discharge if left stored uncharged for long periods

Warranty

Standard manufacturer warranty; no recalls reported in available sources

Sources

“Leadfoot awarded the GB50 a 4.7/5 overall, praising performance and design”

Have you used the NOCO Boost XL GB50 UltraSafe Lithium Jump Starter?

Tell other campers how it worked for you.

Last updated June 25, 2026