Car Jump Starter, FLYLINKTECH 4000A 12V Portable Car Battery Booster Jump Starter Power Pack (up to 9.0L Petrol Or 8.5L Diesel Engine), Power Bank with LED Flashlight, IP67

I used the FLYLINKTECH 4000A for the first time over the weekend, and wow, I’m glad I had it. Even though I have breakdown cover, I didn’t want to sit around waiting for the recovery service to show up, so I decided to give this jump starter a try—and it totally saved me a ton of time. Quick & Powerful Jump Start This thing is seriously powerful. It jumped my car’s dead battery without any issues, even though my car is on the larger side with a 3.0L engine. No more waiting for a tow truck to get me back on the road—just hooked it up, and I was good to go in minutes. Great Value for Money I was honestly surprised by how much this little device can do for the price. It’s not just a jump starter; it doubles as a power bank too! The USB-C charging is super handy, and the fact that it can charge my phone or tablet on the go is a nice bonus, especially when I’m out on long trips or camping. Handy LED Flashlight & Waterproof The built-in LED flashlight came in clutch when I needed a bit of light while figuring out the car situation, and the fact that it’s IP67 rated means I’m not worried about using it in the rain or throwing it in the trunk with my gear. Honestly, for the price and what it can do, it’s great value. If you’re like me and don’t want to wait for help when your car dies, this thing’s a must-have. So much quicker and easier than waiting around for recovery!

Was very sceptical but happily surprised as this product works excatly as it should and is very well rpiced when you look at others on the market. Had to use it in an emergency use and started vehcile no problem, only took 1 attempt to start vehicle which had a completely flat battery, it is small and compact and fits away in boot easily, very happy buyer

I had a track day booked at Brands Hatch, 3 days before the track day my battery is flat, left the interior light on all weekend accidentally! Ordered this in the morning and it arrived the same day. I have wanted something like this for ages, however the price has always been a bit much. Then this came up for a very decent price. I chucked it on the car, and bang, instantly started up. Very easy to use. This has been put in my track day tool bag/car as a just in case. The amount of these being used (not specifically this model, but this type of thing) at Brands Hatch in the pits was crazy. It asks for a review of the Carry case but it doesn’t actually have one. It’s just a drawstring bag that’s a little too small. But other than that that it’s great. Seems nice and powerful and seems to do the job! I even used this to charge my phone on the USB port on my drive home as it charges quicker than the car. Torch that’s in it is very bright also. For the money, even if you use this once, it’s a bargain! Our local recovery are charging £80 for a jump off a NOCO. This will do that job easily.

It took a few attempts but it actually started my car twice when the battery was flat. Great value for that, the unit charges very slowly but it's a pretty good capacity and mostly just keep it in the car for emergencies. Would give 5 if it charged faster and managed to jump start the car on the first couple attempts. But in an emergency it will eventually get your car moving again.

This is a great little piece of kit that is now a staple item in my car. Ordered one day and received the next. I was looking forward to testing this but was waiting for an opportunity. Then I get a call from a friend whose car had been sat on their drive for a few months and they needed to move it. Unfortunately the battery was completely flat with no life in it at all. I was happy to use this as a test on this charger and have to say it can through with flying colours. It was simple to attach the cables to the charger pack (no chance of getting these wrong) and clamped them snuggly and securely in to the drained battery. Then turned the key and the car sprang into life! It was immediate and was like a new battery had been hooked up. I simply and safely removed the charger pack and popped it back in its box for next time. Not only is it a neat little charger pack but also has a handy flashlight on it (very useful as this was in the evening) and has USB ports for charging phones, etc. If you are looking for a compact, durable, and effective charger, you can’t go wrong with this. Great product, great price. What more could you ask for. Highly recommended.

Bought this due to having a flat battery, and thought it would be worth having for an emergency anyway when I didn't have time to wait around for the breakdown service and not able to jump start from another vehicle. Arrived with around 75% battery, gave it a boost to full power. It did say charge the unit for 7 hours before first use, but I needed to get the car started to charge the battery before leaving it overnight. First time, I don't think I quite got enough of a good connection at the battery terminals, and the LED light stayed red indicating an issue. Car wouldn't start. I removed the clips, unplugged the adaptor from the main charger unit and reconnected. Then connected the clips back on the battery terminals..... Car started! Wonderful. It also has USB port to chart your devices, so it's going to be a mainstay in my car for occasions where brekadwon might occur, I need to jump start the car and also to keep phones charged up in an emergency. Great stuff.

This item is useless! It may be that I got a bad one. I bought this in 2024 as a "just in case" item. I have tried to use it on three occasions and it has not worked once. Twice it simply would not start the vehicles - 1.9 turbo diesel and a 2.0 turbo petrol - apparently not enough power! Once, the leads were simply not long enough to stretch between the jump starting terminals under the bonnet and the battery itself was tucked away under a lot of trim inside the car. Now, it will not accept full charge, so I must find a way of disposing of it. At first I thought it might have been my fault, but I have another similar product in the USA and that has worked perfectly.

I bought this October 2025 on a friend's recommendation, charged it fully when it arrived and put it in my car with no personal experience of how well it works. Today, 4th April 2026, my brother's car would not start so I pulled it out and it still showed 4 bars of charge, attached it to his car battery and got it fired up in no time, furthermore it still shows 4 bars! A compact and handy device for those unwanted moments, saves the time and hassle of calling out a breakdown service.

Il FLYLINKTECH 3500A è un avviatore di emergenza potente e versatile, perfetto per chi vuole una soluzione affidabile per avviare la batteria dell’auto in caso di necessità. Con una potenza di picco di 3500A, è in grado di avviare veicoli a benzina fino a 10.0L e diesel fino a 8.0L, rendendolo ideale per automobili, SUV, moto, camion e persino barche. Design e Qualità Costruttiva • Compatto e leggero, facile da riporre nel bagagliaio o nel vano portaoggetti. • Scocca resistente agli urti e alle alte temperature, per una maggiore durata. • Schermo LCD integrato, che mostra lo stato della batteria e il livello di carica. • Torcia LED multifunzione, con modalità luce fissa, strobo e SOS per situazioni di emergenza. Prestazioni e Funzionalità • 3500A di picco, permette di avviare un veicolo in pochi secondi. • Batteria da 26800mAh, che funge anche da power bank per dispositivi mobili. • Due porte USB (QC3.0 e USB-C), per ricaricare smartphone, tablet e altri dispositivi. • Protezione intelligente con 8 livelli di sicurezza, tra cui protezione contro cortocircuiti, inversione di polarità e surriscaldamento. • Adatto per condizioni estreme, funzionando efficacemente tra -20°C e 60°C. Pro e Contro ✅ Pro: • Potenza elevata per avviare anche veicoli di grossa cilindrata • Design compatto e facile da trasportare • Funziona anche come power bank con ricarica rapida • Torcia LED integrata con modalità di emergenza • Protezione avanzata contro sovraccarichi e inversione di polarità ❌ Contro: • Necessita di essere ricaricato periodicamente per garantire la massima efficienza • Non compatibile con alcuni motori di cilindrata molto elevata (oltre i limiti dichiarati) Verdetto Finale Il FLYLINKTECH 3500A è un avviatore di emergenza potente, sicuro e multifunzionale, perfetto per chi vuole una soluzione compatta ma efficace per rimettere in moto il proprio veicolo. Con la sua batteria di lunga durata, protezioni di sicurezza avanzate e funzioni extra come il power bank e la torcia LED, è un accessorio indispensabile per ogni automobilista.

I bought the Flylinktech 800A Car Jump Starter while on a trip that had to be extended due to unforeseen circumstances. We flew to Washington DC for a planned two week trip while leaving our Toyota Corolla in an extended parking garage at the airport. In the past, we had problems starting our Corolla after three weeks without starting it (it cranked, but barely). So when we had to extend our stay to a full month I was concerned there was a chance it might not start after such a long time sitting in the parking garage, even though it now had a new battery. So I ordered this jump starter on Amazon and had it delivered to the hotel with no problems. I picked this one for a number of reasons. The price seemed very reasonable compared to the others that came up in my Amazon search, but importantly (besides the reviews) because it also serves as a phone charger, and I figured it might be easier to pass through TSA at the airport compared to others that are sold on Amazon that are strictly "jump starters". Just in case, and to play it safe so there wouldn't be any problems with TSA I packed the box with the cable assembly that connects to the charger and the battery terminals in my suitcase. The battery pack itself I put in my hand carry backpack like you're supposed (VERY IMPORTANT REMINDER: any and all battery packs, including this one, MUST be hand-carried...you absolutely cannot place these in your checked luggage for safety reasons). On our return to the parking lot after our trip, it turned out my Corolla started up just fine after sitting more than a month. However, the day after I trip when I tried starting my newer Toyota Camry Hybrid it wouldn't start! So I plugged in this jump starter and the Camry immediately started right up. I had to jump start it again a couple of days later to get it to the Toyota dealer for servicing. After two jump starts the jump starter still shows a full charge remaining. Not sure if it's because a hybrid requires less power to jump start it, but I'm very satisfied with the results. I think having a portable jump starter is a great idea because it brings peace of mind if you take it with you on trips you have a ready jump start capability with you if either you leave your car in a long term parking lot, or even if you're on a road trip and your car won't start in the hotel parking lot. I like being as prepared as possibly can, so I've always had a set of good (and long) jumper cables in each of our three cars. However, connecting them and standing around a parking lot begging someone for a jump start is not my idea of fun. Having a portable jump starter that also serves to charge your phone on a trip when you're far from a charger makes this chore more convenient. I could have just as easily jump started my Camry from one of my two other cars using conventional cables, but it was so much easier with this portable jump starter: 1. Connect the short, easy to pack, cables to the battery terminals. 2. Plug the cables into the charger. 3. Press the On button on the charger (the battery pack light starts to flash). 4. Start the car. 5. Unplug the cable and turn off the battery pack. Oh, and this battery back also has a built-in flashlight! I highly recommend this, and will be taking with me from now one whenever I go on a trip. It's money well-spent!

Well I just can't believe how good this device is! I got 10 boosts on 1 charge and then I simply recharged it to full in only 4 and a half hours. I was starting my car,a 2016 Hyundai elantra, in -37 degrees weather and it started no problem! Just remember when you first get it to charge it a full 7 hours before using it, very easy to use!

The product was delivered exceptionally fast and saved me by doing exactly as advertised. Operation was easy and effective, a must have for an emergency kit, especially for the price point!

値段も安価で見た目頼りなさそうですが、寒くてバッテリーが死にかけている時に、さっと繋いでバッチリエンジン始動できる中々の優れものです。ちゃんと充電もできるので安心です。