AstroAI S8 Pro Car Battery Booster Jump Starter Power Pack & Portable Car Jump Starter Power Bank for 12V Vehicles (9.0L Petrol / 7.0L Diesel), with Smart Jumper & LED Torch

I bought this as a generator at work didn't start when there was a power cut. (Battery wouldn't hold it's charge). Anyway ordered it and it came the next day..I took it to work the next day and hooked it up to the generator. Started first time, fantastic piece of kit to have, and keep it in my car now. You don't have to rely on anyone with this. As you do with jump leads. (another vehicle needed). Also like the ports on it to charge phones etc, and a torch. Glad I bought it, good price and as long as you keep it charged up you shouldn't get stranded anywhere.. Battery in generator replaced now. Happy days.

Great product. Connected up to car battery and left it for a minute to get some power in the battery, turned the key and it started up straight away. Highly recommend.

Looks reasonablely well made it was reduced to £39.99 so thought it might be worth a punt as I've just purchased a hybrid car and reading reviews they have to start up in electric mode so if your battery goes flat you can plug this in to get you going it's small enough to fit in glove box and leave it in so it available in an emergency it does recommend you check the charge every three months for state of charge haven't luckily had to use it yet so watch this space.

2l petrol engine Mini with deeply discharged battery (4V - broken).This battery pack connected directly to battery - absolutely needed "Boost" button on adapter pressing. This boost lasts a limited time (?20 secs) but the boost can be repeated as needed - I think the button may need pressing a couple of times in a row to re-engage the boost - there is an audible and palpable "clunk" from the adapter when this happens.I wasn't very hopeful as a full sized booster battery didn't have enough oomph to turn the engine over.This little boost battery has been sat in my other car for a few months, unused, and I thought I'd give it a go.With the boost activated as above, measured static voltage at 15V, and engine turned over and started on first attempt.I'm truly very impressed, I was certain that I'd need a proper jump start from another vehicle.This dropped the charge from 100% to 25% on the boost battery! But I'm very impressed that it worked. 5 stars.Press the boost button! And beware that this mode doesn't last for long. But can be reinitialised.

Ive had this for a couple of months and today I got to use it, twice in the space of an hour! first off to start my 3.6 litre 911 and then onto my 2 litre diesel transporter. worked perfect for both. still showing 75% charge left. I was looking at a more expensive one but happy I chose this one!

Bought this as my battery was going flat with a fault and I could not get into a garage for a few weeks, this has been a life saver, starts the car ford focus first time, very easy to use and great to have a flash light built in.I would definitely recommend this product to friends.

This product does exactly what it says it should do start my Volkswagen Passat diesel as if it had a brand new battery the battery is old and I haven't got round to replacing it yet and it takes a good few seconds of turning over to start the car with this starts as if it was new. If you need something to jump a completely dead battery then this product probably isnt for you .read the description properly about how much power you need it to deliver there's a lot of other reviews saying that it doesn't deliver the power that says it does it does just read the description properly that higher power output is only available for a couple of seconds it's a great battery jump pack for a week to low battery it also can charge your phone and has a handy torch also

Value for money does what it says

VERY GOOD PRODUCT AND THIS JUMPER VERY POWERFULL THIS JUMPER VERY EASILY START 4.5 LITER ENGINE

Für normale Fahrzeuge, sehr geeignet, erfüllt seinen Zweck wurde auch schon genutzt. Preis-Leistungs-Verhältnis stimmt und daher eine absolute Kaufempfehlung.

جيد لكن حيث استعملتها كبنك طاقة لإضاءة لمبة ليد. اعطت وقت قصير 5 ساعات ثم انتهت البطارية بالرغم كانت مشحونة بالكامل.

Had the chance to test mine out only a couple months after I bought it. A bunch of friends were camping and with 2 early-ish (15-20 year old) Diesel Land Cruisers thought it would be a good idea to use the headlights to illuminate the campsite for a few nights in a row bit not driving on the in between days. The 3rd night they all fell asleep so batteries were absolutely flat as a pancake the next morning.I'm the nerd of the group and was already on my way to join them when I got the call - (I was a bit worried as I had to jump-start both of them, as they also had no jumper cables to jump one to the other). I am pretty sure these cars are between 4-5 litre Diesels so below the specs but I know how these things can have exaggerated numbers. Being completely flat batteries I had to press the boost button, which gives stronger current for 30 seconds. I pushed the button and got the first one to crank - it sluggishly turned but didn't start, I then said wait 15 seconds (to give it a chance to juice the battery a bit), and it fired up quickly with no issue.Did the same 15 second wait on the second car, and it fired up first time.Couple of points:- some reviews say that it is only 500 amps after receiving it. The 3000 figure is "peak amps" which they apparently apply for a second or two to get the thing turning but then settle down to 500 amps for the remainder of crank. I have had several jump starters over the years and ALL appear to advertise the peak amps figure. Many aren't honest enough to give the lower "cranking amps" as this one does so everyone is none the wiser. So keep that in mind when looking at the specifications of jump starters.- after jump-starting these two vehicles, only 2 of the 4 LEDs on the unit remained lit, so I wonder if it would have had enough in it to do a 3rd car (I had started a 2.5 litre petrol about a month prior and all 4 were still lit so never thought to recharge it - this worried me also). Keep in mind that these 2 cars are 4-5 litre Diesels (at the very high end of 4WD Diesel towing vehicles in Australia), and also keep in mind that these batteries were absolutely dead flat. I suspect it would have far more jump starts in it if not having to use the "BOOST" button for 2 large Diesels and not having done another jump-start a month earlier, so I am impressed regardless.

I bought the AstroAI S8 Pro Booster Pack mainly for peace of mind, and it really came through when I needed it. I’ve used it twice so far once on a car with a completely dead battery, and it started instantly with no issues. That used about half the battery charge.The second time, I used it on a larger truck, and again, it started right up without a problem. That time, it used just over half the charge. For something this compact, I’m seriously impressed with how much power it delivers.The build feels solid, and the included bag and cables make it easy to store in the trunk without taking up much space. It’s definitely a great tool to have around not just for yourself, but to help others out too.Highly recommend it for anyone who wants a reliable jump starter they can count on when it really matters.