Amazon : 36 Volt Lithium Battery
Litime 36V 55Ah TM LiFePO4 Battery, Low Temp Protection Deep Cycle Rechargeable Solar Battery, Built-in 55A BMS, Up to 15000 Cycles, Ideal for Trolling Motors, Boats, Marine, Solar, etc. LOSSIGY 36V Lithium Golf Cart Battery, 36 Volt 100Ah LiFePO4