MIGHTY MAX BATTERY 6V 4.5AH Battery Replaces PS-640 GP645 LC-RB064P NP4.5-6 NP4-6 NP5-6 PE6-4 - 2 Pack MAX3426666 - The Home Depot
Amazon.com: NERMAK 6V 6Ah LiFePO4 Lithium Battery, 2000+ Cycles Rechargeable Lithium Iron Phosphate Battery for Emergency Light, Lantern, Kids Ride On Car, Deer Game Feeder and More with BMS (F1 Terminals) :