Gel battery Nexon TN-GEL 12V 28Ah Long Life — 12V 28Ah sealed gel battery for backup and standby use

Nexon TN-GEL 12V 28Ah Long Life is a sealed gel lead-acid battery with a nominal voltage of 12V and a usable capacity of 28Ah. Engineered for backup and standby applications, the gel electrolyte immobilizes acid to provide leak-free operation and reduce maintenance. The battery is suitable for installation in enclosed equipment and supports both horizontal and vertical mounting, delivering dependable short- and medium-term power for a variety of systems.

Advantages

The gel design eliminates free liquid electrolyte, minimizing the risk of leakage and allowing safe operation in sealed and upright enclosures. Low self-discharge and improved cycle endurance provide longer service intervals compared with conventional wet batteries. Maintenance-free construction and robust valve-regulated technology reduce the need for periodic checks, while the sealed housing offers vibration resistance and safer handling during installation and replacement.

Suitable for

• Uninterruptible Power Supplies (UPS) for small servers and network equipment
• Alarm and access control systems
• Emergency lighting and exit signs
• Standby power for telecom and monitoring devices
• Portable power modules and small-scale backup units

Key specifications

• Nominal voltage: 12 V
• Rated capacity: 28 Ah (at specified discharge conditions)
• Electrolyte type: gel (sealed)
• Construction: lead-acid, valve-regulated (maintenance-free)
• Mounting orientation: horizontal or vertical
• Installation environment: indoor, enclosed equipment
• Typical applications: backup, standby and emergency power

How to use

Install the battery in a dry, ventilated enclosure and secure it according to the equipment manufacturer’s instructions. Connect terminals only with compatible, correctly rated leads and ensure proper polarity. Observe recommended charging and float-voltage settings for gel lead-acid batteries to maximize life and avoid overcharging. Allow the battery to reach room temperature before charging if it has been exposed to low temperatures, and avoid deep discharges that can shorten service life.

Usage recommendations

Use a charger or UPS with configurable gel-battery charging profiles, monitor float voltage regularly, and perform periodic load tests to verify capacity. Store batteries in a cool, dry place and recharge them every few months if left unused to prevent deep discharge. Replace batteries approaching end-of-life to maintain reliable backup performance.