NOCO Boost GB20 500A UltraSafe Jump Starter, 12V Lithium Battery Booster

Everyone should have one of these! I was able to jump my car when my battery died due to the extreme cold over the winter. Compact and easy to use. Much more reliable than depending on a stranger or waiting for someone to come jump your car.

I've had this for a couple years. Worked well on my car and also on my riding lawn mower. Works so well I got my sister one and she loved it. She found it easy to use and it saved her a few times.

Dependable charger. Worked great for charging car batteries

I have bought three of the GB20 devices over the last seven years or so. All have been helpful, usually for other people and occasionally for myself. One a friend borrowed and lost. The other two continue to serve well. While I recharge the devices once a quarter, they still have plenty of charge before I do. I would buy another, but in my Alfa Romeo 164 the positive post and the ground point are too far apart for the supplied cables to reach. There is no option for longer cables.

I have only had to use this once, thank goodness. I think it is a wonderful tool, and MUCH better than the giant things they sell at Harbor Freight, Walmart, and Lowe’s. Those really don't hold a charge. However, I wish it held a little better. That's all. I think this is at or near the top of its product category.

I'm so glad I finally bought this. Works great and is very easy to use.

I bought this to avoid having to ask for a jump when my battery died. Great investment! I can use it to charge my devices when not using it for my vehicle, it portable so I can take it with me, very durable, easy connectivity, quick charge and includes jumper cables. As a single Female, I highly recommend it for the Ladies!

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!

C'est un appareil vraiment excellent et qui rend bien service. Pouvant être chargé par usb, avec une autonomie de 10 démarrages, je recommande vivement.

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Purchased for personal use but ended up using it for work, never thought it would be as good at it actually is. outstanding little jump pack small and compact light weight Been using it for 18 days approximately jump starting various sized batteries ranging from 420 amp up to 760 amp no problems at all. Have to charge after approx 5 jump starts highly recommended for the price.

Fantastic bit of kit. Got it for a quad and ride on lawnmower that have dodgy batteries that don't charge too good. Works perfectly.

High quality product!