Price as of Nov 8, 11:12 PM ET. Amazon prices change often; the price in your cart is the one that applies.
Code ASTROAIS8U
One of our picks for Monday, November 9, 2026. We haven't tested it. How we pick
The S8 Ultra is a 12V lithium jump pack with a 4000A peak output, smart jumper clamps, a USB-C port that charges a phone, and a three-mode LED flashlight. It is meant for bigger engines than a typical compact pack, including diesel trucks; check the engine sizes on AstroAI's page against your vehicle.
It suits anyone who would rather not wait for another car and a set of cables, especially with a truck or SUV. For a small car, AstroAI's smaller S8 is a lighter option.
Worth knowing AstroAI says to keep it above 75 percent charge for the strongest start, so it needs topping up every few months. The code on the deal page has to be entered at checkout.
We posted it for $39.99 on Nov 8, 2026. This is the first time we've posted this item, so there's no history yet. Products we've posted more than once
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