Mighty Max Battery 12V 5AH Battery for NP4-12 NP5-12 NPH5-12 NPX-25 Rechargeable Sealed Lead Acid 1250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
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Yuasa Yuasa NP4-12 Battery 12 Volt 4 Amp Sealed Lead Acid Battery - 2 Pack 29483506182 | eBay
NP4-12 Ocean 12V 4Ah Battery
12V 5AH SLA Replacement Battery for Genesis NP4-12 - MightyMaxBattery
NP4-12 - 12 Volt/4 Amp Hour Sealed Lead Acid Battery with 0.187 Fast-on Connector (2 Pack) - Walmart.com