Heavy Duty Jump Starter,DM1264 30000A 12V Battery Jumper Starter Portable,-40F° Start Battery Booster Pack for Semi Truck Gasoline and Diesel Engines Up to 99L,Class8

Excellent product. I had a School Bus with 3 dead batteries. I hooked up the jump box and it fired up with no problems immediately!

Worked great jumped a semi off with vary dead batterys

It works pretty good but it seems to drain and need charging fairly quickly. It is reliable if not used too many times in a short period on 13L and 15L engines.

THIS IS A HEAVY DUTY JUMP STARTER FOR PERSONAL OR COMMERCIAL USE.

Excelente, mucha potencia vale la pena para los que lo usamos para trabajar

Working in the heavy duty diesel industry this jump pack has proven to be a crucial tool to have in my service van. So far I have not found a dead truck that this unit cannot provide enough power to start! Very happy with my purchase and would recommend to others. Works just as well as any competitors very expensive alternatives.

I jump my semi volvo 860 vnl in 5min. My investment is worth every penny.

Muy bueno

The DM1264 heavy‑duty jump starter is an impressive piece of equipment, built with the kind of reliability you want when dealing with large diesel engines. Although I'm unable to test the 30,000A peak rating I can attest that this unit delivers the current needed to turn over high‑compression engines without hesitation. I tested it in cold conditions, and the cold weather starting capability is absolutely legitimate. I was using it in about -24C(-11.2F) and it came through each and every time and actually states it is rated to work in up to -40C/F. Voltage stability is excellent, and the unit maintains safe output levels even under heavy load which is extremely important not to fry equipment. The build quality seems strong, with solid terminals, thick cables, and a housing that feels ready for shop, roadside, or fleet use. The clamps on this are some of the strongest clamps I have seen on a booster and give and extremely strong grip. They do take some hand strength to get them to open - not an issue, just so you are aware. The cables slide nicely inside the bottom of the unit which makes it much nicer to move around and for storage. The internal battery management system does a great job regulating charge and preventing over‑current or reverse polarity issues. It’s also surprisingly portable for something with this much power, making it practical to keep in a truck, service vehicle, or garage. It weighs around 14LBS but has a nice strong handle and is evenly weighted making it relatively easy to carry around. What stands out most is how quickly it recovers between uses and how confidently it handles large displacement engines, both gasoline and diesel. The largest engine I tested this on was a 14.9L diesel, and it boosted it without the slightest hesitation. I also used it on smaller engines including an 8.9L diesel, a 6.6L diesel, and a 6.0L gas and it handled all of them effortlessly This is not a consumer booster, it’s a professional‑level booster designed for commercial vehicles, heavy equipment, and anyone who needs guaranteed starting power in harsh conditions. Next, this thing does have the option to charge external equipment via USB, 12V car adapter and a DC port. With the massive amount of power storage this thing has - it gives it endless uses and options that could be useful in a lot of different situations. It also has a nice powerful light on it that has a solid beam, red and blue warning light and an SOS option which is a nice feature to have in emergency situations. If you need a dependable, high‑output jump starter that performs exactly as advertised, this one is built to do the job. Well deserved 5 stars.

I used the Heavy Duty Jump Starter DM1264 on my truck and it worked well. It felt very strong and started my diesel engine quickly, even in cold weather. The unit is heavy but that makes it feel solid and reliable. I liked that it is easy to connect and the cables were thick and good quality. One thing to know is that it is big and heavy, so it’s not as easy to carry around as a smaller jump starter. But for my truck and big engines, it gave me confidence that it will work when I need it. Overall, it did the job and I would use it again.

Very powerful starter. My neighbor had an accident and couldn't drive after surgery and as such his diesel truck was parked for months without use. At some point he tried to start it but with -40C, it wouldn't go anywhere. I saw his son tried with a smaller starter, but he drives a small car so the starter wasn't strong enough. I saw them struggling in the cold, but fortunately I remembered this beast of a charger. OMG it had no issue whatsoever starting the truck on first try! This thing is heavy and powerful. The clamps are strong, much stronger than some I've seen that the cover shattered when used a few times. It also recovered very quickly after starting the truck. I like it that it also comes with a 12v plug that can be used, for example, for a tire inflator, and USB ports that can be used to charge a phone or some other accessory in a pinch. Anyway, it's heavy but packs a punch, even in extreme cold conditions and gives us the peace of mind that we won't get stuck because of a dead battery.

When I ordered this, I had high hopes. But Kinda got disappointed after trying it out a couple of times. So this is a nice heavy-duty jumper starter. However, after testing it out in a real-world environment, given how expensive this thing is, I'm quite disappointed. Okay, so here's why: First and foremost, this is supposed to be a heavy-duty jump starter designed for heavy-duty equipment like trucks, tractors, etc. So why is there no protective seal around its various openings? Like there's a bunch of DC and USB plugs, but they are all left open. I only use this outside of a garage. In the dirt, snow, dust, etc. Just after one use, the ports were filled with snow. Right now, it is winter here, but I'm sure the same thing happens with dirt. Also, if they aren't going to cover all those ports, why did they put them there in the first place? Most people have power banks these days. There's no need to include features that are 1- not necessary, 2- add vulnerability to the unit. This is supposed to be a heavy-duty jump starter. Now granted, it did jump-start the truck I was trying to jump-start. But definitely not worth it at this price point of almost $2k. Now, keep in mind, there's a class 8 12V 64,000 mAh battery with 30,000 A peak current. So this will get you unstuck where some other jump starters won't. But it's not for everyone. There's another point of sale that advertises this starter to work in extreme temperatures between -40 degrees F and 140 degrees F. That's between -40 degrees Celsius and 60 degrees Celsius. I don't know if the higher end of it is true, but it did hold its own in -35 (with wind chill). Another note, this jump starter is big and heavy. It's meant to be, I guess. Not a complaint. Just a note, so you know. Feature-wise, I know I complained earlier about the DC and USB ports. My complaint is mainly due to how exposed they are. But sure, they are useful. You get one single car charger. That's kinda disappointing for a jump starter of this calibre. I would have expected at least two. Also, unfortunately, there's no AC output. I have a few much lower-powered and smaller jump starters that have built-in inverters that can provide 110V. This feature would have been a great plus. Overall, yes, I'm quite disappointed. This will get your vehicle/equipment started. However, due to its design faults, it may easily get damaged. I suggest putting a tape over all the open plugs to prevent snow, moisture, and dirt from getting in. Also, given the price point, I don't feel I'm getting something worth the price...

Worked perfectly boosting my 6.7L diesel after it had been sitting for 2 months. Took less than 2 minutes to get it to start. The body of the booster feels kinda cheap and flimsy when compared to its weight, I am scared it will shatter if it falls from the height of an engine bay. The cables are fairly long and they real back into the body so it doesn’t have an unnecessary amount of cable hanging out when you’re not using the booster. Obviously with how big of a unit this is, it takes a while to charge but compared to my smaller boosters it’s not too much more. The screen displays its mode and output and input clearly. So far after a single charge to 100% on the unit it still has charges in it after boosting about 5-7 vehicles.