4x Pack UB645 Replacement for Dual Lite 3921 — UpStart Battery Brand 6V 4.5Ah (4500mAh) AGM SLA, F1 Terminals + 8 F1 to F2 Adapters

Replacement set of four UB645 sealed lead-acid batteries compatible with Dual Lite 3921. Quantity: 4. Each battery is a 6V AGM/SLA unit with 4.5Ah (4500mAh) capacity and equipped with F1 terminals. The package also contains eight F1 to F2 terminal adapters for flexible mounting and connection. Brand: UpStart Battery Brand.