36V 10.5Ah Large Capacity: The upgraded 36V 10.5Ah E bike Battery Compatible with all SONDORS Steps and Smart Step from 2019-2023 and all SONDORS Smart Steps purchased from Costco for all years.The single-charge range can reach 40-125 kilometers with PAS sensor (depend on riding conditions, road conditions, rider weight, etc.). Battery Detail Design: Case size 477*45*80mm, Parcel Listing:Battery 1pc,Keys 2pcs,User manual 1pc Easy to Install: With its easy step through frame Motor Limits: COMPATIBLE WITH 36V 0-800W MOTORS: Take your electric bicycle to the next level with our powerful battery compatible with motors ranging from 0 to 800W. Experience the thrill of enhanced speed and performance like never before. Warranty: All our batteries and kits accept return back and refund within 30 working days and 18 months warranty for battery cells and motor.If you want to return back,please contact our service firstly before shipping out.We will handle in time.All messages can be replied within 8 hours. 36V 10.5Ah Ebike Battery Compatible with all SONDORS Steps and Smart Step from 2019-2023 and Costco Style