4x Pack UpStart Battery Brand UB645 Universal Sealed Lead Acid Battery - Compatible with Criticare Systems 503 (6V, 4.5Ah / 4500mAh, AGM SLA, F1 Terminal) - Includes 8 F1 to F2 Terminal Adapters

Set of four UB645 replacement batteries from UpStart Battery Brand, designed as compatible replacements for Criticare Systems 503. These universal sealed lead acid (SLA) / AGM batteries are rated 6V with a capacity of 4.5Ah (4500mAh) and come with F1 terminals. The bundle includes eight F1 to F2 terminal adapters to accommodate alternate connector types.