Boost GB50: 1500A UltraSafe Jump Starter Power Pack – 12V Car Battery Booster, Portable Power Bank & Jump Leads - For 7.0L Petrol and 4.5L Diesel Engines

What a life saver to have this on hand, or in the back of your car! Gotten myself, friends and strangers out of trouble more than once! Well worth the price! Charges nice and quickly so you're not caught short, and ready to start your car when the power in your battery isn't up to the task! A nice sturdy build, and small enough to not worry about storing it anywhere specific!

Bought this a few years ago when our battery was constantly draining and it was so easy to use and never let us down. Since then a couple of neighbours have tried to jump their cars and failed and I have offered to use this and they have said don’t bother it won’t work. I said give it a try and both times it started them without a problem. It keeps its charge for several months.

Used this to start a strangers car. The were elderly and were expecting jump leads from my car they looked amazed. I have their battery charger too great quality products.

We have a 2.8 diesel Chrysler Grand Voyager. We've had trouble starting it over the years if it hasn't been used for a while, and it does NOT like starting in winter. This has been particularly bad recently, even with a fully-charged battery. This device has changed all that. Recent overnight temperatures have dropped to at least -4 and the car would not start, but started instantly when I connected the power pack. I've done this on a few occasions now, and it works every time. I did look at the GB40 but that goes up to 3.0 for diesels (I'm a 2.8) and a few reviews suggested that these devices might not quite reach their advertised thresholds. Rather than take a chance, I went for the more powerful GB50 and it's been great. The price goes up a fair bit from GB40 to GB50 but we need our car to be reliable and I though it was worth paying the extra now rather than regretting saving a few pounds later. The only downside is that there are no instructions on how to use it! I just went on YouTube and found a video easily enough. That's not enough for me to knock a star off the rating, but is a bit daft. The device is actually pretty easy to use. There is an option to deactivate the safety mode for when the battery is completely flat. I've not tested that, and some reviews suggested that this caused problems. In that scenario, I'd just whip the battery out and put it on charge.

Got this and, when my Jeep's relatively new battery recently died in cold weather, this thing managed to turn the engine and sustain it, despite my forgetting to reset idle. Once reset, I used this again and it turned the 3.7L V6 lump again. Afterwards, checked the levels and was only half-used. So this definitely performs and I'm well happy with this. The unit itself is deceptively small for the power, smart-looking and light, with quality charge cables (although these could be longer) and a car charger plug, handy for charging on the go. Downsides? Well as others have noticed, the instructions are tiny, especially for an old git like me, so this must be rectified at this price (hence only four stars). I'm sure there are those who had bad experiences who didn't know the right setting for a completely flat battery (you have to override it), and not everyone carries a magnifying glass with them, so this is a big omission. Also, for what it is, it is pricey.

I have a motor home with a 2.3L diesel engine which - depending on the time of year - can be parked up for a good few weeks at a time without moving. I got this because I was worried that I’d rock up at the compound during the winter months when the solar panel may struggle to keep the batteries charged and I’d struggle to start the van with a flat battery. It’s not happened yet. What did happen ( I now know ) is that the cab battery suffered cell damage so whilst away ( far, far from home) I couldn’t start the motorhome. Every time I needed to start it, I used the GB50 and it started in a few cranks. The alternator was generating enough leccy to keep the engine running once it was started but the battery couldn’t hold enough charge to start the engine. So each time I turned the ignition off, I used the GB50 to restart the engine. This means fuel stops, waste water dumps, stalling (?) etc So I reckon I used the GB50 maybe 7 to 8 times before I got it to a local place that could diagnose and swap the battery out. Performed brilliantly. If I didn’t have the GB50 it would have been a recovery job and I’d have to cut the holiday short. People weren’t always around to give a jump start. So yes, if that battery is as ‘flat as a witch’s tit’ it’ll start it but also if the battery was totally bust like mine then it *still* started the van. I’d rather not be in the position to have to call on the GB50, but when I needed it it saved my holiday. So now I’m an advocate 😃 What I would say though is that the distance between the HD leads is only good enough to reach between the posts of your batteries. In my case, I used specific designated jump start points in my engine bay ( Fiat Ducato - you must not jump start via the main battery due to ECU issues ) and these jump start points are further apart than the supplied leads will go so I used a jump lead as an extension to the HD leads as supplied. This shortness of terminal HD lead is the only grumble that I have.

Noco Boost XL GB50. Got to replace the ( SECOND ) Suaoki jump start & power pack. This seems better quality.

Excellent, returned home after an extended vacation: the car battery was so flat, it would not even turn the starter motor. Having anticipated this problem, I had charged my NOCO Boost, several months earlier. Once connected to the battery and car’s earth connection point, my car started on the key, first time, after I had reviewed a ‘learning video’ on a social media platform.