Blasting the AC, charging devices, and extreme heat and cold can make your battery tap out without warning. That’s why a portable jump starter like the NOCO Boost is a no-brainer for peace of mind—and right now, they’re at their lowest prices of the year on Amazon during Prime Day, running July 8-11, so grab one ASAP. Remember, if you don’t have an active Amazon Prime subscription, you can sign up for a free 30-day trial here. As a bonus, it doubles as a portable power bank to keep all your other gadgets charged, too. The GB70 offers 2000 amps of power for engines up to 8.0L gas and 6.0L diesel, with up to 40 starts per charge.