Amazon.com: AJC Battery Compatible with Piaggio Liberty 150CC Scooter and Moped Battery (2018) : Automotive
Piaggio NRG 50 Battery (all) also fits Sactto Battery (all)
250 miles in on my Piaggio One Active. Absolute top speed is only 48 mph but good around town. 35-50 miles per charge, 5-6 hours to charge from flat. Helmet+battery fit under