Brand new, never used - ordered by mistake. These batteries are typically used in emergency lighting and alarm systems. F1 terminals.

Manufacturer's info:
ML4-6 SLA is a 6V 4.5AH Sealed Lead Acid (SLA) rechargeable maintenance free battery - UL Certified
Dimensions: 2.76 inches x 1.89 inches x 4.21 inches. Terminal: F1. Listing is for the Battery only. No wire harness or mounting accessories included.
SLA / AGM spill proof battery has a characteristic of high discharge rate, wide operating temperatures and long service life.
Rechargeable battery that can be mounted in any position, resists shocks and vibration. Long lasting high performance in high and low temperatures.
New in the box.

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6V 4.5AH SLA Battery (Cambridge, Inman Sq.)