autowit SuperCap 2 12-Volt Battery-less Portable Jump Starter (Up to 7.0L Gas, 4.0L Diesel Engine) Built-in SuperCap, No Need of Regular Charge, 10 Years Lifespan, Extremely Weather Operating

Nachdem schon 2 Powerbanks versagten bin ich mit dem -immer funktionierten- Starthelfer - auf der sicheren Seite

Good solid build, draws it's power from the flat battery. So if your battery goes flat and no one else is around it could be a live saver.

Simple et efficace

I'll start this review by saying I own both this Autowit jump starter as well as their previous model. As such, I can compare them fairly well. You may have seen this product on a popular YouTuber's channel and while it doesn't come out on top, I'll explain why this technology is right for me. I live in the subarctic where winter's super cold temperatures are the norm rather than the exception. The problem with battery based jump starters in cold climates is the battery won't hold a charge while stored in your vehicle for weeks/months at negative temps. These capacitor based systems are essentially immune to this problem, since you charge them when you go to use them and also there is no battery chemistry involved. Conceptually, this unit will take remaining energy from your insufficiently charged battery - and release it all at once, allowing you to jump start your rig. It suffers with really weak batteries, but really, it just takes longer to charge. While it's true that it won't charge from a truly "dead" battery, this is really a better application for a battery charger anyway. That said, you could use the DC accessories to plug this into an alternate power source (another battery, USB or cig lighter adapter) and start a truly dead battery. When I need a jump starter, it's because it's been -40F for a week+ and I haven't started my vehicle. In fact, I've put my old Autowit through exactly that exercise more than once, down to -46F. I gladly bought this updated model for my second vehicle as it's been such a helpful and versatile tool to get through the harsh winters. I've tried this newer one out a couple of times and expect it'll do every bit of what the old model will do. For me, a tool like this needs to be operational at all times (not just fair weather) and this fits the bill nicely. There are some differences and "upgrades" found in this unit, compared to the old version. First, the cover for the plugs is a nice rubber insert, which is infinitely better at handling cold temperatures than the (now rock hard) plastic insert they used previously. The display is nice, it gives you battery voltage and general indicators of status. The buttons are a little more clear in this unit and there is no longer an "on" button, it engages when clamped to your battery. Most importantly, the unit gives you audible clues (beeping) that you can use to know precisely when to start your vehicle. That feature is completely absent on the old version, meaning it was a bit of a guessing game of when to try starting your rig. I also super appreciated the storage case that comes with. As for the bad? There's very little in my opinion, most of my critiques were corrected in this updated model. If I had to pick one thing, it's that the beeping isn't quite loud enough. It's really hard to hear (even in deafening silence) since the hood is often up and in the way of when you need that audible cue. As for the popular YouTuber that rates these - his "cold test" really needs to be multiple weeks at -20F or lower, like it might see in the real world. Overnight in freezing temperatures is nothing, not even enough to take out my battery to begin with. This is one of the only units that is suitable for this scenario. Even if you're not facing these odds, this is still the "survivalist" version of a jump starter - one you can take anywhere and jump almost anything. It's a trusty bit of kit in my book and that's why I now have two of them!

Slower to charge on usb than advertised