• High-performance 12V 18Ah Valve Regulated Lead Acid (VRLA) battery designed for standby and cyclic applications
• Built using AGM (Absorbent Glass Mat) technology for superior reliability and leak-proof operation
• Fully sealed and maintenance-free, eliminating the need for electrolyte refilling
• High capacity design for extended backup time in demanding applications
• Long service life with stable discharge performance under varying loads
• Excellent deep discharge recovery with low self-discharge rate
• Designed for both float service (backup) and cyclic use (frequent charge/discharge cycles)
• Safe operation with spill-proof construction and high vibration resistance
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Technical Specifications
• Nominal Voltage: 12V
• Nominal Capacity: 18Ah (20-hour rate)
• Battery Type: Sealed Lead Acid – AGM (VRLA)
• Design Life: 3–5 years (float service at 25°C)
• Terminal Type: M5 / M6 Bolt Terminal (depending on version)
• Internal Resistance: Low (optimized for high current applications)
• Operating Temperature:
 • Charge: 0°C to 40°C
 • Discharge: -15°C to 50°C
• Float Charging Voltage: 13.5 – 13.8V
• Cycle Charging Voltage: 14.4 – 15.0V
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Physical Specifications
• Dimensions: 181 mm (L) × 77 mm (W) × 167 mm (H)
• Total Height (with terminals): ~170 mm
• Weight: ~5.6 kg
• Case Material: ABS Plastic
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Key Features
• Maintenance-free and sealed design
• Higher capacity for longer backup duration
• High discharge efficiency for demanding loads
• Excellent deep cycle recovery performance
• Reliable in both high and low temperature environments
• Low self-discharge for extended shelf life
• Durable construction with strong vibration resistance
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Competitive Advantages
• Significantly longer runtime compared to 7Ah, 9Ah, and 12Ah models
• Ideal for medium-load applications requiring stable and longer backup
• Trusted Ultracell brand with consistent manufacturing quality
• Superior performance compared to low-cost generic alternatives
• Strong demand in UPS, solar, and telecom applications
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Typical Applications
• UPS systems (medium capacity backup systems)
• Solar energy storage (small to medium systems)
• CCTV and security systems
• Emergency lighting systems
• Telecommunications equipment
• Access control systems
• Medical equipment backup
• Power backup for networking and routers