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

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

Great value, easy to use. Able to provide several jumps on a single charge. Holds charge when in storage.

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!

When I got my starter, I plugged it in to charge, just as if I were charging my cell phone or my e-reader. When the light showed solid green, I threw it in the car with its leads. (By the way: I notice that among those who were unable to charge the starter, all but one of those for whom the information was available were using the model that describes itself as a "Genius" Boost Starter. The GB20 I got did NOT describe itself as a genius.) Here's the beauty of it: you can attach it to your battery BEFORE you turn on the power, so there's no worry about sparks. Left your lights on? No problem. Didn't drive your Prius often enough during the pandemic? No problem. In either case, pop the hood, connect the leads, press the "on" button, get in the car and start it. Get out of the car, disconnect the leads and throw the starter in the trunk or back seat. Drop the hood and drive off. It's easier than having a second car to charge from parked right next to yours. The leads are color-coded, just like jumper cables, and you attach them just like jumper cables, so you don't have to learn anything new. When you press the "on" button, the starter runs a little diagnostic. It is worth reading the instructions. If your battery is terribly low, it might be worth allowing a little time for some electrical charge to run from the starter to the battery, but I've never had it happen to be that low. This accessory has been a must for me with my new Prius during the pandemic, especially during cold weather. I keep the charger near the back door, hooked up and charging. If my Prius doesn't start, no problem. I go back in, get the charger and start it up. In rainy weather, I throw the charger into the hatchback "just in case." I love the safety feature of not having the power on while I connect the cables. I love not having to carry jumper cables with me all the time. I love not having to ask fellow motorists to assist me with a jump. I love the fact that charging the starter is as easy as charging my cell phone. I love not having to wait for AAA to arrive when it's just the battery. (Yes I do keep my AAA membership, not every problem is solved with jumper cables.) I love not having to figure out how to keep a maintenance charger running safely. On the whole, I consider the money I spent on this to be very well spent indeed!

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.

Jesteśmy zadowoleni.

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!

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