The unit we'd hand a stranger without instructions: 2000A of spark-proof, reverse-polarity-protected output that starts big gas and diesel engines, backed by 30,000+ owner ratings. You pay for the safety engineering and the amp headroom — the smaller GB40 below is the same safety system for half the money if your engine doesn't need 2000A.

The value pick for people who want the pack to double as a laptop/phone bank: 2000A of starting power — the same class as the GB70 — plus 65W USB-C PD that charges in and out. The 3.3-inch screen reports exact charge and fault state rather than making you guess at LED bars.