Amazon.com: ExpertPower 6 Volt 4.5 Amp Rechargeable Battery (EXP645) : Tools & Home Improvement
Amazon.com: NERMAK 6V 4.5Ah 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) :
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Amazon.com: Long Way LW-3FM4 6V 4.5Ah Sealed Lead Acid - AGM - VRLA Replacement Battery : Health & Household
MIGHTY MAX BATTERY 6V 4.5AH Replacement Battery compatible with Sigmas SP6-4.5 - 15 Pack MAX3864091 - The Home Depot