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.

The step up from the GB70 when you are starting a big diesel — NOCO rates it 4000A against the GB70's 2000A.

The glovebox standard for regular cars: 1000A is plenty for 4- and 6-cylinder gas engines, with the same spark-proof clamps as the pricier NOCO units. Skip it only if you run a large V8 or diesel that wants more amps.

The high-amp budget option: 4000A peak rated for all gas engines and diesels up to 10.0L, with SuperSafe clamp protection and a big enough cell to work as a dual-USB power bank. Note this is the GP model — GOOLOO's pricier GT4000S is the one with 100W two-way USB-C, which this does not have.

The headroom option for big trucks and diesels: AVAPOW rates the A68 at 6000A peak and up to a 12L diesel, with an eight-layer clamp protection system and indicator lights that make a wrong connection hard to complete. It also works as a dual-USB power bank with a 3-mode LED light. Overkill for a commuter car, right-sized if you regularly start large diesel powerplants.