Amazon.com: AlveyTech 12 Volt Battery (5 Ah no Harness) - For the Razor MX125, 12V Replacement Rechargeable SLA AGM Batteries, Electric Power Dirt Rocket, Go-Kart Quad, E-Scooter, Mini Pocket Bike Parts, 1-Pack :
Duracell Ultra 12V 5AH Deep Cycle AGM SLA Battery with F1 Terminals - WKDC12-5F at Batteries Plus
12V 5Ah Battery, Sealed Lead Acid battery (AGM), B.B. Battery BP5-12, 90x70x102 mm (LxWxH), Terminal