This Jump Starter Is on Sale for Fall Prime DayGannon Burgett - Car and DriverIt's that time of year for Amazon's Prime Big Deal Days, and that means some of the products we've tested are on sale.In our test of the best portable jump starters, the Gooloo GT6000 received our Best for Larger Engines award, because it can jump-start gas and diesel engines up to 12.0 liters, with a peak amperage of 6000 amps (hence the name).GooLoo GT6000A Portable Jump Starter$123 at amazon.comThis hefty gadget might not fit in your glove box, but it does come with a nylon drawstring bag for tossing into the trunk. It also acts as a power bank for juicing up your devices, meaning it can really come in handy in case of emergencies. This is definitely something you'll want to keep with you on road trips or during the winter months.We were impressed with the build quality and general feeling of durability, providing confidence that it'll hold up over many years. We also admired the incredibly bright LED flashlight with various modes, noting how helpful it'd be in the event of nighttime use. Additionally, the 3.2-inch frosted-glass display is easy to read unless it catches the sun wrong, but most of the time it's great.According to Gooloo, it can charge from zero to 100 percent in under an hour and a half and is able to jump your car after charging for just seven minutes. We do wish the cables were a little longer, but we found the larger clamps to be much easier to use while wearing gloves than many of the others we tested.Whether you've got an old muscle car with a giant V-8 or a newer diesel truck, this is an essential appliance, and you can snag it now for a discount during Prime Big Deal Days, which ends after October 7.Gift Guide: Best Ride-On Electric Cars for KidsFuture Cars Worth Waiting For: 2025–2029