12V 4.5 amp hour (AH) Lithium Iron Phosphate battery packs which are a direct replacement for sealed lead acid batteries, including chargers, LiFePO4.
Power-Xtra 12V 4.5 Ah Sealed Lead Acid Battery - Power Xtra
Battery 12V 4.5AH Sealed Lead Acid
12V, 4.5Ah LFP Battery (PVC, BLF-12045W) – Bioenno Power
Amazon.com: 12V 4.5Ah SLA Replacement Battery for Liftmaster 3850, 3850-267 : Health & Household
Long Sealed Lead Acid Battery 12VDC, 4.5AH
Storage Batteries 12v 4.5ah Lead Acid Rechargeable Battery Ups Electricity Back-up Power Electric Door Solid Control Equipment - Rechargeable Batteries - AliExpress