China Battery Manufacturer E Bike Akku Electric Bicycle 48V 10ah Li-ion Battery Pack Hailong Downtube Lithium Battery for Electric Bike 48volt - China Lithium Ion Battery, Li-ion Battery | Made-in-China.com
Amazon.com: 48V 30Ah E-Bike Lithium Ion Battery, Replaceable Battery Pack, with BMS + 54.6V 2A Charger, for 350-1000W Electric Bicycle Scooter : Sports & Outdoors