GOOLOO GT6000 Review

GOOLOO's GP4000 has been this guide's budget pick for a while, and the GT6000 is a different animal entirely: a flagship built to compete with NOCO's biggest packs on spec sheet rather than price. The headline number is 6,000 peak amps with an engine rating GOOLOO lists as covering any gas engine and diesels up to 12.0 liters — on paper a step past the NOCO GBX155's already-substantial 10.0L gas/8.0L diesel ceiling. Tech Advisor's review calls it an ideal do-it-all pack, and a separate test reported by SFGate describes clean first-try starts, including on a fully dead 6.7L Cummins diesel in freezing temperatures.

The rest of the spec sheet supports the flagship positioning. A 99.9Wh cell is among the largest in this guide, and 100W bidirectional USB-C — a first for a pack at this price — means a full recharge takes under an hour and a half instead of the better part of a day, while doubling as a fast charger for a laptop. The 3.2-inch color display replaces the usual row of LEDs with actual numbers, and testers describe the reverse-polarity protection working as advertised: a wrong connection triggers an alarm and a display warning rather than a spark, with the jump starter and the vehicle's fuses both unharmed.

The caveats are the same ones that applied to the WOLFBOX MegaVolt24 when it first showed up in this guide: a 6,000A figure is a manufacturer rating with no independent standard behind it, and a brand-new flagship tier hasn't had years of owner use to prove out its clamp electronics and cell longevity the way NOCO's lineup has. GOOLOO also sells this pack bundled with cases, chargers, and even a companion tire inflator under closely related listing names, so check the exact configuration before buying. None of that changes the core value proposition: for a big diesel truck or piece of equipment, the GT6000 claims GBX155-class coverage for well under half the price.