Eastar EA690 F1 6V 9Ah Sealed Lead Acid Replacement Battery with F1 Terminals : Amazon.ca: Electronics
6V 9Ah Compatible Replacement Battery for Kid Trax 6 Volt Disney Cars Toddler Quad - Model # KT1016TG Ride-on Toy by UPSBatteryCenter® : Amazon.ca: Electronics
SES BT9-6 Replacement 6V 9Ah Battery (1 Pack)
Lead Acid 6-Volt 7.0 Ah Black Replacement Battery B LA 6V 7.0A - The Home Depot
6V 9Ah Battery, Sealed Lead Acid battery (AGM), B.B. Battery HR9-6, 151x34x94 mm (LxWxH), Terminal T2 Faston 250 (6,3 mm)
Connecting batteries in series – BatteryGuy.com Knowledge Base