Okay, so your Hiboy scooter charger bit the dust? No worries - this 42V replacement charger has got you covered! It works with pretty much all the popular Hiboy models: S2, S2 Lite, S2 Pro, KS4, KS4 Pro, MAX, MAX3, MAX V2, NEX, NEX3, and NEX5. But here's the cool part - it's not just for Hiboy scooters. This thing works with most 36V lithium battery electric scooters and bikes out there. We're talking Jetson Ebikes, Gotrax scooters, Swagtron EB5 Pro/EB7/EB8, and even Ancheer electric bikes. The specs are solid: input is AC 100-240V 50/60Hz (so it works pretty much anywhere), output is DC 42V 2A, and it's got a nice long 10ft power cord with a US standard plug. The LED indicator is super helpful - red light means it's charging, green light means you're good to go. It's got all these safety features built in too - protection against short-circuits, over-voltage, and a bunch of other issues. Just a heads up though - this won't work with 3-prong connectors, and it's not for 24V, 25.2V, 29.4V, or 48V batteries. Also, don't use it with lead-acid batteries. But if you've got a 36V lithium battery scooter, this charger is an absolute lifesaver!