The Xiaomi Electric Scooter 4 Ultra does not have 36v electronics, for this reason it needs a specific charger for a 47v battery. Specific connector for Xiaomi 4 Ultra
Xiaomi Electric Scooter Fast Charger
Replacement charger for Mi4 Pro
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Compatible Charger For Xiaomi electric scooters
iscooter i9MAX Electric Scooter Adult, 500W Motor, 10 Solid Tires, 21.7 Miles Long Range, 18.6 mph Folding Commuter Electric Scooter for Adults,Front (Ultra Double) Suspension and Dual Braking