BATTERY FOR WP3-12 Backup 12 Volt 3.4AH Replacement Battery for WP3-12, UB1234 (D5740), YT-1232, PS-1230, SW1233 and NP2.6-12. Mfr Part Number: SP12-3.5 (12 Volt 3.5 AmpH) Sealed Lead Acid Battery Item Package Quantity: 1 Guaranteed compatibility with OEM battery