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

I live alone on a lake in the middle of nowhere. Came out there day to a dead battery and ordered this guy! The NOCO Boost GB20 has been one of the most useful automotive gadgets I’ve added to my car kit. This little jump starter packs a surprising punch — it easily starts my 12V vehicles with engines up to 4.0L gas without hesitation. What I love most is how compact and portable it is; it fits in a glove box or backpack, so it’s always ready without taking up much space. Setup is super simple: just connect the clamps, and the LED indicator lets you know you’re good to go. The UltraSafe technology gives extra peace of mind because it’s spark‑proof and reverse‑polarity protected, so even if you clip the clamps wrong (we’ve all been there), it won’t hurt the battery or device. Beyond jump starting, the built‑in USB port doubles as a power bank for phones and gadgets — perfect for emergency charging on the go. Battery life stays strong between uses, and the GB20 recharges quickly so it’s ready when you need it. If you want a dependable, easy‑to‑use jump starter that’s more powerful and safer than a traditional roadside pack, this one is absolutely worth it! Absolutely a great value and gets your car going quickly!

It's amazing and easy to use. I've help jump start a few cars,. It's not bulky and fit nicely in the car. Great price, I've recommended it to a few people.

Bought this thing a month ago, charged it fully and kept it in the trunk. Woke up today to a dead battery in single digits temperatures. Rushing to go to work with no time to waste, this little beast started my truck in a single start. Gave it 5 stars for keeping 100% charge through a month of freezing temps, and for working in a start despite the battery being fully dead. It still showed fully charged even after that use.

Haven't used it to jump a battery yet but lemme tell you !! Packaging = amazing Quality = Amazing flexibilty = amazing value for money = amazing The cable length could use some work It has a flashlight! so thats cool

I’ve used the NOCO Boost GB20 twice now, and both times it saved me from what could’ve been costly and time-consuming situations. Instead of calling a tow truck or waiting around for someone with jumper cables, I was back on the road in minutes. It's incredibly easy to use—even if you're not mechanically inclined—and it holds a charge for a surprisingly long time. I charged it once and it sat in my car for weeks before I even needed it, and it still worked perfectly. Recharging it is quick and hassle-free. This jump starter has already saved me money and time, and it’s given me peace of mind knowing I have a reliable backup in my glove box. If you drive a gas vehicle (up to 4.0L), I highly recommend this. It’s compact, powerful, and an absolute must-have!

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.

i have had to use these in the past and they work exactly as they need to when you are in trouble. i have several sizes of this product already, so i bought this for my motorcycle and UTV. they seem to hold a charge for a long time (i check and top up the charge every six months). comes with outlets you can use for small electronics to recharge, but the real use is in the clamps to jump your battery.

This battery charger is wonderful!! My niece and her husband have borrowed it two times now to charge their car battery and it worked fine!! Great brand and has many features on it I will buy again later in for my granddaughter for her car

Excelente producto, me ha servido muchísimo. Fácil de usar. Gracias

Va bien para arrancar batería de moto BMW F 650 GS de 2012.

High quality product!

Prix correct fonctionne très bien

I bought the NOCO Boost GB20 as an emergency jump starter for my 2.5 L gasoline sedan, and it has exceeded my expectations. The unit is compact, easy to store in my trunk, and very straightforward to use. the clamps are easy to attach, and the LED indicators make operation simple. One cold Alberta morning when my car battery was dead, I connected the GB20, waited about 30 seconds, and my engine started immediately. It holds its charge well, even after sitting in the car for a couple of months, and also works as a USB power bank with a built-in flashlight, which is handy in emergencies. The safety features like spark-proof clamps and reverse-polarity protection give extra peace of mind. My only minor issues are that it is micro usb charging, and the 500 A rating may not be enough for larger engines or diesel vehicles. Overall, for compact cars or mid-sized sedans, this is a reliable, portable, and versatile jump starter that I would recommend for anyone looking for emergency car battery support.