Amazon.com: 12V 18AH Gel Replacement Battery for Champion Generator 9000 ExpertPower : Automotive
Amazon.com: LPFMAX 12V 18Ah LiFePO4 Battery, Deep Cycle Lithium Iron Phosphate Battery Built-in BMS Protection, 2000-5000 Cylces, 10 Years Lifetime, Perfect for Kid Scooters, Power Wheels, Fish Finder etc : Automotive
Amazon.com: Yuasa NPG18-12 12V 18Ah Sealed Lead Acid Battery - This is an AJC Brand Replacement : Automotive