12.8V 40Ah LiFePO4 Battery Replace GEL/AGM DL-LFP-RP1240 - Delong Energy
Amazon.com: VEVOR Deep Cycle Battery, 12 Volt 40 AH, AGM Marine Rechargeable Battery, High Self-Discharge Rate 400A Discharge Current, for Mobility Scooters Electric Wheelchairs Go-Karts e-Bikes, UL Certified : Electronics