CONCLUSION

    I may not have had many flat tires in my life but when it comes to car batteries, I’ve certainly had plenty of issues over the years. Now both Gooloo units do exactly what they promise, and that’s ultimately what matters most in a jump starter, they start cars reliably and consistently. The A3 brings solid functionality with its inflator and display, though I have to admit that its build feels a touch less premium next to the GT4000S’s heavier, more refined construction. It’s also worth noting that the A3’s built‑in compressor, while convenient, doesn’t inflate as quickly as traditional 12V cigar‑socket inflators, a small but expected trade‑off for having everything in one handheld unit. On the flip side, the GT4000S delivers the more rugged, high‑end experience but ships without a carrying case, so anyone who wants clean storage will need Gooloo's standalone EVA option showcased in this review. In the end, it’s a choice between all‑in‑one practicality and maximum power, and both deliver where it counts.

    This moment in time the Gooloo A3 retails for USD66.50/69.99Euros whereas the GT4000S retails for USD90.25/(not available in the EU) meaning they have different target audiences. Yes, both devices deliver as advertised but if you’re looking for the best jump starter of the two the GT4000S is it. Still if you need something that combines both a capable jump starter and a tire inflator the A3 is the way to go. So, even though Gooloo has better models in their lineup both come highly recommended and should have a permanent spot in every car.

PROS

- Jump Starting Capabilities
- Rubber Coated Battery Connectors
- IP65 Certified (GT4000S)
- Tire Inflator (A3)
- 3.2” LCD Screen
- LED Torch
- USB C 100W (GT4000S)
- Carrying / Storage Pouch (A3)
- Price (A3)

CONS

- Price (GT4000S)
- Inflate Time (A3)