NOCO Boost X GBX45 Jump Starter

The GBX45 is a 1250A portable jump starter rated for gasoline engines up to 6.5L and diesel up to 4.0L. No third-party electrical safety certification (UL or ETL) was found — the Amazon spec table lists "Specification Met: energy" rather than UL, and the manufacturer's specs page makes no certification claim. NOCO's UltraSafe 2.0 system includes spark-proof clamps and reverse-polarity protection, which community reviewers consistently describe as foolproof in operation. The 1250A peak rating has not been independently bench-tested; community evidence spans passenger cars with completely dead batteries, a 3-litre diesel, and motorcycles — all starting reliably. The detachable clamp leads allow the unit to fit in a glovebox, and at 2.16 lbs it is one of the more compact options in the class rated for diesel engines. The 60-second timer conserves the battery between connection and cranking; a manual override button starts the vehicle immediately.

The GBX45 fits drivers who want a compact jump starter capable of covering everything from a motorcycle to a mid-size truck or light diesel — stored in a glovebox and used infrequently as emergency equipment. The 60W USB-C Power Delivery is a genuine feature at this tier, not just a token USB-A port. Skip it if you need independent certification documentation (no UL or ETL confirmed) or if you're regularly starting large-displacement diesels above 4.0L — the GB70 or GBX75 cover that range.

The GBX45 is an electronics device with no SDS. No third-party certification (UL or ETL) has been confirmed — the Amazon listing does not claim UL, and no certification was found in third-party databases as of 2026-06-01. Standard Li-ion battery with NOCO UltraSafe 2.0 BMS and reverse-polarity protection; no documented thermal runaway incidents; CPSC recall database returned no active recall for this model (checked 2026-06-01). California Prop 65 warning applies. Battery disposal via Call2Recycle drop-off at Home Depot, Lowe's, and Staples — no manufacturer pre-paid take-back documented.