NOCOBoost GB20: 500A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 4.0L Gas Engines

I've jump-started my car maybe 6 - 8 times on a single charge with this battery pack, which I leave in my car full-time, all year long.I have a little-used car and the internal battery runs down so far nothing works at all. I need to use the "override" feature nearly every time (which is not well-documented, I have to keep going back to their web site to remind myself how it works) but once the pack is geared up and ready to go, my car alarm starts wailing and I can start it on the first try. No chugging or waiting for anything to "get more power" or whatever.I was initially worried about which exact model to purchase (NOCO makes a variety of battery packs for different loads; I had borrowed a friend's much more powerful GB150 which is 3000A versus this 500A pack), but this one works perfectly fine for my manual 4-cylinder car. We'll see if the "20 jump-starts per charge" is real, but even getting half that would be impressive.The connector wires couldn't be simpler: there is only one way to connect to the battery pack, you match red-to-red and black-to-black on the battery and go for it. The jaws are not as substantial as a regular set of jumper cables, but they seem both sturdy and appropriately "springy". I don't anticipate having to replace them any time soon. Fortunately, NOCO actually sells replacement wires, though they are fairly expensive relative to the cost of the kit (~$80 for the kit, ~$35 for replacement wires).I'd love to have more instructions printed on the device itself, especially for the "override" which unfortunately for me I have to use often.

One of the best things to have in your carI once gave someone a charge on the last battery life of the machine, it took a little while but it worked that’s how good it is.

I'm glad to report great results. I bought mine over a year ago and after charging it, its just been sitting through a hot Texas summer and fairly cold winter. My daughter left the dome light on over the weekend so when I tried to start up this morning I was met with fairly dead battery, starter wasn't even clicking. I've got a 1st Gen Sequoia with a 4.7L V8, I originally bought this battery for a Camry and was considering getting a larger model, but after today I'll stick with what I've got. After hooking it up, the engine cranked right up with no struggle at all. It did drain the Noco fairly significantly, I started at full charge and after I started the engine, it showed half battery, but I don't really find a problem with this though. I plugged it in when I got to work and it came back to full charge in a little over an hour. Overall, very impressed and would recommend.

Recomendado funciona bien, pero la carga no dura mucho

This thing is a lifesaver!! We love it! It works perfectly and it's strong and hold a very long charge. This battery booster hasn't let us down at all and we have had to use it with semi trucks and SUV's and it worked like a champ! We are very pleased. It was worth every penny!

The product does work and works good. No issues jump starting a CAN AM Spyder F3 LTD. Very easy to use. The only reason giving it 4 starts vice 5 starts is that the unit's battery does not retain its charge. You almost need to charge the unit weekly or at least check the status. I left the unit unattended for two weeks (no use, no need) but it was almost drained. Compare that with my portable air compressor that retains its charge for weeks on end. If you can remember to check the battery status at least weekly, then it's a good buy. You just don't want to be caught off guard needing it either for yourself or another person in need, and the unit is dead because it's been a week since you last charged it.

Muy bueno y super importante tenerlo

THIS BRAND HAS BEEN THE BEST JUMP STARTER FOR BATTERIES. COMPACT AND POWERFUL