Mighty Max Battery ML5-12- 12V 5AH Replaces Werker WKA12-5F Rechargeable Sealed Lead Acid 1250 Backup Power Batteries in the Device Replacement Batteries department at Lowes.com
Charity Battery Replacement Battery for Werker WKA12-5F - 12 volt 5ah SLA 691344627277 | eBay
Werker WKA12-5F 12V 5Ah Sealed Lead Acid Replacement Battery: BatteryClerk.com