A jump starter is an essential part of car's emergency kit, and a cordless one eliminates the need to plug it into an available cigarette lighter. You don't need to pay a premium for a jump starter that reliably gets the job done, either. Amazon is currently offering this AstroAI S8 Pro 12V 3,000A cordless car jump starter for $35.99 shipped after you clip a 40% off coupon code. Not only does it function as a jump starter, it can also be used to recharge your smartphone in a pinch.AstroAI S8 Pro 12V 3,000A Car Jump Starter for $35.99Clip the 40% Off CouponAmazon AstroAI S8 Pro 3,000A 12V Cordless Lithium Car Jump StarterThe AstroAI S8 Pro is a 12V cordless car jump starter that can supply 3,000A of peak power and 500 cold cranking amps. AstroAI states that it's capable of jump starting up to 9L gas or 6L diesel engines. The sizeable 12,000mAh battery will give you several jump starts before needing a recharge. Since the battery uses lithium (NMC) cells, it depletes a lot slower than your traditional battery and will retain most of its charge even after 24 months of non-use. Because the S8 Pro is essentially a portable power bank, you can also use it to charge your iPhone or smartphone in a pinch.The S8 Pro charges quickly over USB Type-C and if you don't have a cable on hand, a USB Type-A to USB Type-C is supplied in the package. There's even a flashlight with three separate modes (flashlight, SOS, and strobe) for emergencies. The jump starter is relatively compact, weighs about 1.5 pounds, and stows away easily in your trunk or dash.Why Should You Trust IGN's Deals Team?IGN's deals team has a combined 30+ years of experience finding the best discounts in gaming, tech, and just about every other category. We don't try to trick our readers into buying things they don't need at prices that aren't worth buying something at. Our ultimate goal is to surface the best possible deals from brands we trust and our editorial team has personal experience with. You can check out our deals standards here for more information on our process, or keep up with the latest deals we find on IGN's Deals account on Twitter.Eric Song is the IGN commerce manager in charge of finding the best gaming and tech deals every day. When Eric isn't hunting for deals for other people at work, he's hunting for deals for himself during his free time.