Power Sonic PS-1290 Battery 12V 9AH 12 Volt 9 Amp 6-DW-9 CP1290 HR9-12 813340010482 | eBay
Universal Power Group 12V 9AH Sealed Lead Acid Battery Replaces CP1290-8 Pack Components Parts
Mighty Max Battery 12V 9Ah Battery for Vision CP1272, CP1290 Rechargeable Sealed Lead Acid 1290 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com