Amazon.com: NPP NP6-5Ah F1, 6V 5Ah Battery Rechargeable Sealed Lead Acid 6V 5 Ah Battery for Ride on Toy, Solar System, Emergency Light, UPS, Alarm System, Control System, Telecommunication System F1 Terminal :
Amazon.com: NPP 12V 8Ah F2 12Volt Rechargeable Sealed Lead Acid Long Life UPS Battery with F2 terminals for Security Systems, Electric Toys, Replace APC Back 1500VA LCD Sla Battery BR1500LCD 4 Pack :
Amazon.com: Ritar RT680 6V 8Ah F1 Replacement Battery : Health & Household