Sealed AGM battery QOLTEC 12V 4.5Ah, 12 Volts, 4.5 Ah, T1 (4.75 mm) terminals

Sealed AGM battery QOLTEC 12V 4.5Ah is a valve-regulated lead-acid (VRLA) rechargeable battery designed for compact, maintenance-free power in standby and cyclic applications. With a nominal voltage of 12 volts and a rated capacity of 4.5 Ah, this battery provides stable DC power for UPS units, alarm and security systems, emergency lighting, and various portable devices. The T1 (4.75 mm) terminals enable straightforward connection to equipment and wiring harnesses, while the sealed AGM construction prevents electrolyte leakage and permits operation in different installation orientations.

Advantages

The AGM design offers low internal resistance, good charge acceptance and reduced self-discharge compared with older flooded lead-acid types. The sealed, valve-regulated construction ensures maintenance-free operation without the need to add water, and it minimizes gas emissions under normal use. Compact dimensions and a steady discharge profile make the battery suitable for tight spaces and predictable backup runtimes. T1 (4.75 mm) terminals provide a reliable and widely compatible electrical interface for common connectors.

Suitable for

• Uninterruptible Power Supplies (UPS) for small servers and network equipment
• Alarm, access control and security systems
• Emergency and exit lighting systems
• Portable measurement instruments and handheld devices with compatible voltage
• Standby power in compact industrial or telecommunication cabinets

Key specifications

• Nominal voltage: 12 V
• Rated capacity: 4.5 Ah
• Battery type: Sealed AGM (VRLA)
• Terminal type: T1 (4.75 mm)
• Design: Maintenance-free, valve-regulated
• Typical use modes: Standby and cyclic operation

How to use

Install the battery in equipment designed for 12 V lead-acid batteries, observing correct polarity and ensuring secure connection to the T1 terminals. Charge the battery with a compatible charger or charging circuit that provides appropriate float or cyclic charge voltages for sealed lead-acid batteries. Avoid deep discharges where possible to prolong service life; follow the device manufacturer's recommendations for charge and discharge limits. Ensure adequate ventilation around the battery and avoid placing conductive objects across terminals.

Usage recommendations

For reliable performance, store and operate the battery at moderate ambient temperatures and keep it fully charged during long-term standby storage. Periodically check system charge voltage and load behavior, and replace the battery if capacity has diminished significantly or if physical damage is present. Use appropriate protective equipment when handling lead-acid batteries and follow local regulations for recycling or disposal.