Description
AG180-12-T1: backup power you can count on
Sealed reliability for your critical systems
The AG180-12-T1 is the 12 V – 18 Ah sealed lead-acid battery from the ON LITE AG series, designed to deliver stable, reliable backup power to UPS units, battery packs and security systems that require extended runtime. Built on proven AGM (Absorbent Glass Mat) technology with VRLA (Valve Regulated Lead Acid) safety valves, it combines high-performance plates and electrolyte in a fully sealed case.
With a design life of 12 years in float service at 25°C, it is built for installations where every replacement costs time and downtime: fewer interventions over the life of the system and a stable energy reserve for longer.

Key benefits and features
- Sealed AGM VRLA technology: the electrolyte is absorbed in glass-fibre separators and a safety valve regulates the internal pressure. The result: no acid leakage, no topping up, no maintenance.
- Ready for demanding discharges: heavy-duty plates and an internal resistance of approx. 13.0 mΩ when fully charged allow it to deliver up to 270 A for 5 seconds.
- Long life and low self-discharge: design life of 12 years in float service at 25°C and low self-discharge, so it holds its charge even during long periods of inactivity.
- Stable performance across temperatures: at -15°C it still delivers 65% of its rated capacity, 85% at 0°C and up to 102% at 40°C. For the longest service life, install it in an environment close to 25°C.
- Robust, certified construction: automated assembly, copper M5 threaded terminals and an ABS (UL94HB) or flame-retardant ABS (UL94-V0) case. It meets IEC, BS, JIS and Eurobat standards and is CE and UL certified.
- Safe transport: designed to be transported safely by road, rail, sea and air.
Key technical details
| Parameter | Specification |
|---|---|
| Technology | Sealed lead-acid AGM VRLA |
| Nominal voltage | 12 Vdc (6 cells) |
| Rated capacity | 18 Ah (20-hour rate at 25°C) |
| Design life | 12 years in float service at 25°C |
| Float charge voltage | 13.50 – 13.80 Vdc at 25°C |
| Cycle charge voltage | 14.40 – 14.70 Vdc at 25°C |
| Max. discharge current | 270 A for 5 seconds |
| Internal resistance | approx. 13.0 mΩ (fully charged at 25°C) |
| Capacity vs. temperature | 65% at -15°C – 85% at 0°C – 100% at 25°C – 102% at 40°C |
| Terminals | M5 threaded (T1) |
| Dimensions (L x W x H) | 182 x 77 x 167 mm (height including terminals) |
| Weight | 5.03 kg (±3%) |
| Case | ABS (UL94HB) / flame-retardant ABS (UL94-V0) |
| Standards and certifications | IEC, BS, JIS, Eurobat – CE, UL |
Why choose the AG180-12-T1?
Choosing the AG180-12-T1 means relying on a safe energy reserve, ready when you need it.
It is the ideal solution for:
- UPS units and battery banks: with 18 Ah and M5 threaded terminals, it is well suited to UPS battery banks and battery packs that must deliver extended runtime.
- Fire and security systems: provides the capacity needed by control panels and security systems that must run for long periods without mains power.
- Solar installations and power stations: stores energy in solar installations, power stations and telecommunication systems, with a stable and reliable voltage.
With its sealed construction, 12-year design life and compliance with the main international standards, the AG180-12-T1 is the reliable choice for anyone who installs and maintains uninterruptible power supplies, battery banks and security systems.
Immediate Availability | 12-Month Warranty | Specialist Technical Support




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