Amazon.com: Replacement Battery F1 12V 3.2Ah for Toro Lawn Mower # 106-8397, BB BP3-12 - Length: 134 mm (5.28") x Width: 67 mm (2.64") x Height: 61 mm (2.40") by UPSBatteryCenter : Health & Household
12v Batteries - Batteries - The Home Depot
Amazon.com: Enersys 12V 4.5Ah SLA Rechargeable Battery for Security Systems : Health & Household