GOOLOO GT4000S: jump-start your car in seconds and fast-charge your laptop at 100W — 33% off

Getting stranded with a dead battery is one of the worst surprises a car can give you — the GOOLOO GT4000S handles it on its own, no need to flag anyone down. It delivers 4,000A of peak power and can jump-start engines up to 10L diesel, with an LED screen showing real-time status and 10 built-in protections for peace of mind. It also fast-charges your phone or laptop at 100W, has a 400-lumen flashlight with SOS mode, and a single charge is good for up to 60 jump-starts. Amazon's Choice rated 4.6 stars with 2,700+ ratings (2,000+ bought in the past month) — today at 33% off.