ESTEL DJM1240 12V 40Ah Compact Lead Acid Battery Reliable Power Solution for Telecom and Backup Systems

Overview

The ESTEL DJM1240 is a versatile 12V 40Ah lead-acid battery designed for space-constrained applications requiring dependable power. With its compact ABS enclosure and maintenance-free design, this battery delivers stable performance across a wide temperature range while offering up to 12 years of float service life at 25°C. Ideal for telecom equipment, small-scale UPS systems, and emergency lighting, the DJM1240 combines robust 400A surge capacity with certified safety features including UL and CE compliance.

Key Features

• Compact Design: Space-saving 197×165×170mm (7.75×6.50×6.69in) footprint
• Maintenance-Free: Sealed construction prevents acid leakage
• High Surge Current: 400A peak discharge (5-second duration)
• Temperature Resilient: Operates from -20°C to 55°C (-4°F to 131°F)
• Long Service Life: 12-year design float life at optimal conditions

Technical Specifications

Core Parameters

Capacity Performance (25°C)

Electrical Characteristics

• Max Discharge Current: 400A (5s pulse)
• Internal Resistance: 9.0mΩ @25°C
• Self Discharge: ≤3% per month @25°C

Charging Parameters

• Max Charge Current: 12.0A @25°C
• Float Voltage: 2.25-2.30V/cell
• Equalization Voltage: 2.35-2.40V/cell

Performance Data (25°C)

Constant Current Discharge (Amperes)

Constant Power Discharge (Watts)

Applications

• Telecommunications: Network equipment, base stations
• Backup Power: Small UPS systems, data racks
• Emergency Systems: Exit lighting, security devices
• Medical Equipment: Portable devices, monitors
• Renewable Energy: Small solar storage systems

Certifications & Standards

• Safety Certifications: UL, TLC, CE
• Performance Standards: IEC 60896, GB/T19638, YD/T 799, DL/T 637
• Manufacturing Certifications: IATF 16949, ISO 9001, ISO 14001, ISO 45001

Why Choose ESTEL DJM1240?

1. Space-Efficient: Compact size fits tight installations
2. Reliable Performance: Stable output across temperature extremes
3. Easy Installation: Standard M6 terminals for quick setup
4. Low Maintenance: Sealed design eliminates watering needs
5. Proven Safety: Meets international safety standards