Boost X GB45: 1250A UltraSafe Jump Starter Power Pack – 12V Car Battery Booster, Portable Power Bank & Jump Leads - For 6.5L Petrol and 4.0L Diesel Engines

I was a bit sceptical about this after calling the AA to start my Transit Custom about 6 times because of a battery drain somewhere, they struggled to start it with their booster. I ordered this and was amazed on how quick it started the van from completely flat, I couldn’t even open the doors with the central locking because it was so flat, put this on the engine earth and live terminal under the bonnet, really easy, then turned the key and it fired up instantly. I’ve used it twice now without having to re-charge it, I’ve also used it to charge my phone and it has a handy torch too. It’s excellent!!! Well worth the money.

Great bit of kit, was skeptical at first. Been having issues with my battery in my Vauxhall Grandland X. Recently had a brand new battery fitted but battery keeps going flat after no use after a few days, possible alternator issue. Car wouldn't even get going on jump leads. Tried this on first attempt and didnt start, however it did try and turn over. What I didnt realise is, once plugged in, ALLOW MINIMUM OF 60 SECONDS before trying to start the car to allow the battery pack to pump some juice into the battery. Once I tried this, car started first time! One thing to note is that it will only jump start your car once before needing a recharge. But all in all, a great bit of kit in an emergency situations.

Picked this up for van stash and roadside backup—wanted something that could fire up a flat battery without dragging out jump leads or waiting for help. The GBX45 delivers. 1250A peak current is no joke—started a diesel van and a 2.0L petrol car with zero drama. No sparks, no hesitation. Lithium build keeps it light, and the casing’s rugged—feels like it can take a knock. USB-C input/output means it doubles as a power bank too—charged a phone and a torch off it while camping. LED light’s bright enough for night work, and the clamps are solid—no flex or cheap feel. Good stash-ready gear for anyone who wants peace of mind on the road without the faff. 👍 Pros ✅ 1250A peak—starts most cars and vans easily ✅ USB-C power bank—charges phones and gear ✅ UltraSafe tech—no sparks or reverse polarity risk ✅ Compact and rugged—easy to stash in boot or cab ✅ LED work light—handy for night use or emergencies 👎 Cons ❌ Premium price—worth it if you want reliability ❌ No hard case included—store carefully ❌ USB-C cable only—no wall charger in box ❌ Not for heavy-duty trucks—check your engine size 🧭 Personal Review If you want a jump starter that’s compact, powerful, and built for real-world use, the NOCO GBX45 earns its spot. I’ve used it across van setups, roadside calls, and weekend trips—no drama, just clean starts and solid backup. Proper stash-ready gear for anyone who wants their battery sorted and their gear charged.

Excellent piece of kit multiple uses has certainly helped me on a number of occasions. Simple to use on my Ford Transit.

I originally bought this as an emergency boost for my Land Rover defender which is nearly 30 years old. However I’ve only used it on my 2012 Audi 2.0 tdi technik. On a full charge it will only start the Audi once when the battery is reading 12.3 volts. A modern Audi will not even activate the starter if there isn’t enough charge in the battery to turn the engine over and successfully start. That’s a minimum of 12.5 volts on my ‘12 plate. It does work but you’ll only get one go at starting the car on a charge. Recharge takes about 7-8 hours after one attempt. In conclusion this product works in a emergency but will only work once on a 2.0 tdi Audi. Generally Diesel engines need more current to start than petrol so that might improve things a little. That said, it’s good to have in the car in case you accidentally flatten the battery beyond starting voltage but not completely discharged.

.Excellent product. The battery of my manual Honda Civic was down for weeks. As suggested, I used override mode and, guess what? It started immediately. I am highly satisfied with this purchase. Moreover, the design of the product is sturdy.

Product that I received was faulty but manufacturer replaced it with a working one that is excellent. I had the product in my car for 11 months before I needed to use it because my car would not start, it was then that I found the NOCO Boost to be faulty. The product has a 12 month warranty, so I was lucky that I had to use it in 11 months!!!! So I suggest you test yours as soon as you buy it. Make sure the lights chase and the 12 volt clear light illuminates. Service support from the USA was very good and the replacement unit is excellent .

Very dangerousGot woke up yesterday morning to a pop.An all the final alarms going off.It was on charge normally over night and it decided to explode, fill my house with gas and smoke and set fire to the wall and our armchair.While me, my wife and my ten month old baby were upstairs but reached out to the company and day only offered me 35% discount on the same model. Very disappointed, end up very shaken up just lucky we where home or it could