4-Pack UB645 Replacement for APC SmartUPS 400 — UpStart Battery 6V 4.5Ah (4500mAh) SLA/AGM with F1 Terminals + 8 F1 to F2 Adapters

Set of four UpStart Battery UB645 replacement cells compatible with APC SmartUPS 400. Quantity: 4. Each is a 6V Universal Sealed Lead Acid (SLA) battery with AGM construction, rated 4.5Ah (4500mAh) and equipped with F1 terminals. Includes eight F1 to F2 terminal adapters to accommodate systems requiring F2 connectors. Pack provides direct replacements for APC SmartUPS 400 units using UpStart Battery components.