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Sealed Rechargeable Lead-Acid Battery (3FM4(6V4AH/20HR)) - China lead acid battery and sla battery
Amazon.com: 6V 4.5Ah F1 - Compatible Replacement Battery for Long Way LW- 3FM4.5 / 3FM4.5 : Health & Household
Amazon.com: BatteryGuy LW-3FM4 Replacement 6V 4.5Ah SLA Battery Brand Equivalent (Rechargeable) - Qty of 1 : Health & Household
Amazon.com: Long Way LW-3FM4 6V 4.5Ah Sealed Lead Acid Battery - This is an AJC Brand Replacement : Health & Household