NOCO Boost GB40: 1000A UltraSafe Jump Starter Power Pack – 12V Car Battery Booster, Portable Power Bank & Jump Leads - For 6.0L Petrol and 3.0L Diesel Engines

Good item to have if your car battery goes flat - I have used twice with no problems & it started my car first time - Booster is Portable & Easy to Store in car - Quick & Easy to use - Easy to recharge via USB in car or indoors (while Booster comes with a USB charge lead, make sure it fits your charging ports - I have older car & had to use different USB lead - But it worked fine - Newer cars be ok) - Item delivered quickly & safely packaged - Highly Recommend if you'd like peace of mind in the event of a flat battery...!

Very impressive. I bought this to replace another similar device that I previously purchased that just didn't have the power to start my 2 litre BMW car on a cold day. This product was the real deal. All you do is connect it to your car battery terminals and just start your car. My battery was draining flat on a daily basis but this product started my car in seconds every single time. It's well made and so easy to use and best of all, it can start an completely flat battery. Watch some of the videos on YouTube about this item and the tests it has been put through for further proof of just how good it is. Best tip is to use it when it is 100% charged.

I’ve had this for a couple of years now so have had chance to use it now and again. It started my wife’s (1.4L petrol) engine immediately when the car battery went flat, and again the next day, without a recharge in between. I had less luck trying to start the 2L petrol on a Mazda I had SORNed for two years during the pandemic - but it turned out the battery on that was completely gone (along with the bodywork of the car, sadly). So it definitely works for jump starts but it’s not going to provide you with a miracle. I have also taken this battery on a few camping trips. Its solid, rugged design makes it much better suited to tent life than are those slim portable batteries designed for business trips. It also has a decent torch built-in, and you can never have too many of them when you’re camping. I’d estimate it can recharge a modern iPhone from almost dead to full approx three times along with occasional use as a torch - so it can supply a family for a night or two, provided the kids are round the campfire not hiding in the tents on their iPads. You probably wouldn’t want to use it heavily for camping, as like any battery it may degrade to the point where the primary car start function fails, but it’s a nice bonus. I’m pleased with this purchase. It’s a handy device to keep in the boot of your car at all times and has the bonus capability of providing battery power outdoors. Even if you have other cars around, it’s easier to use this than traditional jump leads: you don’t need to move two cars close enough for the jump leads to reach, or open two car bonnets.

Firstly I have been trying to find out how long the main booster cable are - they reach 23 inches (just) from tip of red croc clamp to tip of back croc clamp, by pulling them straight, only just ok for a Kuga PHEV under bonnet plus and minus posts. Secondly I didn’t realise that the connecting charge cable is USB C at both ends so you’ll need a USB C charger ( Anker £7.98) or a USB A to USB C connecting cable as most places I’ve stayed only have A outlets so C to C will be useless. Other than that, it appears well made and comes with a soft bag to keep it in, make sure you download the operating manual from Amazon as it’s not included in the box

I have to say that it worked great. I was away for several weeks. The battery still had power but not enough to start my 2020 car with original battery. Not the first time this happened. I called AA but my coverage expired. It would cost £150 for a call out. Now I have a device that I can carry in the boot, clamp a few bits and be on my way if it happens again. It's not rocket science. Just look at the car manual and the device instructions.

Don't normally leave reviews but this product deserves one. Bought the NOCO Boost GB40 for my son for Xmas. However my car battery declined over that Xmas period. I used this to start my 1.4ltr Astra 6 times. My car started each time as if it had a brand new battery. The NOCO charge indicater didn't move, as if it had never been used. This product is unbelievable. Buying another for myself to leave in the boot. Bye bye jump leads the future is here.

So after using what was possibly a faulty OBD that coincidentally lowered the battery voltage within a few minutes of use on my 2016 Ford Mondeo 2.0l diesel to the point I had to get the AA out as my car wouldn't start. The AA guy gave my battery a health check , checked the charging system of the car and said it was all working fine but the battery volts were too low at 10v to start the car. He connected a booster pack and the car started with a single push of the starter button. He advised I drive the car for a good 40 minutes to charge the battery back up. Unfortunately, I didn't do that and although the car started fine the next day , I did do several short journeys and then didn't drive the car over the weekend. Went to go to work this morning and "click", the car wouldn't start with the battery light on the dash lighting up. Luckily, I had purchased this booster on Friday night from Amazon, it came Saturday, I charged it via one of the usb ports on our kitchen sockets until fully charged, about 3 hours. Got the opportunity to use it this morning, plugged on the jumper cable to the booster and the leads onto the battery, jumped into the drivers seat and pushed the starter button, car started instantly with no problem. I've driven about 200 miles today with one of the legs being around an hour and a quarter so hopefully the car battery has fully charged. If I need to use this regularly I think I'm going to have to buy a new car battery, but, we will see how it goes. As for this little box of tricks, very impressed, saved me calling out the AA again and having to hang around waiting, also saved me from cancelling a call to my first and second customer. Easy to use, saved me a load of hassle, very pleased with this. Thank you.

I bought this to replace a 6 year old, 500A, £45, no-name brand USB jump starter that was still starting the engine first time but only giving me 2 jump starts before needing to be charged, when it previously managed around 10 jumps. Decided to go for Noco as they are so highly rated but should have listened to the bad reviews.... I got the pack fully charged and tried it out on my 2.0L Diesel which regularly goes flat as something drains the battery and it fails to start if not driven every day- really should get it sorted! The Noco failed to start the car twice in normal mode so I turned on the Boost/override mode. This just about got it started but sounded like it struggled. (I waited about 30 seconds each time before starting the car) When I disconnected the charger I noticed it was almost flat with the red light showing, which was quite surprising as it says up to 20 uses between charges. I re-charged the Noco and tried again 2 days later. It took 2 attempts in normal mode this time and drained the pack to 50%. While the Noco did manage to start my car, I am disappointed with the performance and capacity. No idea how anybody could get 20 jump starts out of this and I really doubt the 1000A claims as my old 500A pack started the engine much faster and more reliably- while also lasting much longer! I did research the Noco jump starters before buying and decided on this GB40 pack over the GBX range as the GB(non X) ones are supposed to hold charge longer and give more jumps per charge, so I would definately not recommend the GBX either based off this experience. The GB40 has also been updated/refreshed but the Amazon listing has some conflicting info- I received the new version which includes a USB-C in/out port and a USB-A out port but no 12V lighter socket port or attachment. It also includes a thin fabric carry pouch (useless), a USB-C to C cable (no charging plug included) and the jump leads, which are short but were fine for me. The older version has 2 USB-A ports (1 in/out the other just output), a USB-A to A cable and a 12V lighter socket charger. The USB-C input is 5V 2.1A so no fast charger needed, pretty much any USB capable of charging will support this nowadays. Battery says it is 24Wh. If charging a phone from the USB port @ 5V 2.1A this would give 4800mAh but you would lose some of that as it wouldn't be 100% efficient so not enough to give a full charge on most modern phones. The jump leads seem high quality and have a strong grip. Connecting the leads to the power pack is not as easy as with other jump starters- have to push it quite hard to get it in, and it is not super clear which way round it is supposed to go in as the hole/plug is round-ish with no obvious markings- you have to look at the shape of the terminals inside the plug and socket and match them up (one is round, the other square). Unfortunately the jump starter I was previously using is no longer being sold so I will have to return the Noco and give another brand a try.