Battery charging tieline for Ninebot One C, One C+, One E, and One E+ models.
Original Upgrade Extend Battery with Quick Charger For Ninebot One A1 S1 S2 Self Balancing Electric Unicycle Scooter 54.3v 155wh - AliExpress
Amazon.com : 9bot One A1 Electric Unicycle Self Balancing Single Battery 155WH, Portable For Beginner, Lightweight, Cool Outdoor Sports, For Fun and Commuting : Sports & Outdoors
Ninebot ONE Battery Removal Instructions with Speedy Feet UK - YouTube
Ninebot One S2 - the newest unicycle with most value for your money(White) - Newegg.com
Amazon.com : Segway-Ninebot External Battery Pack for ES1/ES2/ES4 Electric Kick Scooters : Sports & Outdoors
Ninebot One E+ U.S. Warranty Free Shipping - HOODRIDERZ