ESTEL DJM1240 12V 40Ah Compact Lead Acid Battery Reliable Power Solution for Telecom and Backup Systems
Brand Name:ESTEL
Certification:ISO9001, CE, 3C, FCC, TLC
Model Number:DJM1240
Minimum Order Quantity:100000
Payment Terms:T/T
Place of Origin:China
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Shenzhen Guangdong China
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3A-8, SHUIWAN 1979 SQUARE (PHASE II), NO. III, TAIZI ROAD, SHUIWAN COMMUNITY, ZHAOSHANG STREET, NANSHAN DISTRICT, SHENZHEN
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Product Details
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
| Specification | Value |
| Model | DJM1240 |
| Nominal Voltage | 12V |
| Rated Capacity (C10) | 40Ah @1.80V/cell |
| Dimensions (LxWxH) | 197x165x170mm(7.75x6.50x6.69in) |
| Weight | 14.5kg (32.0 lbs) |
| Terminal Type | M6 |
| Case Material | ABS |
| Specification | Value |
Capacity Performance (25°C)
| Discharge Rate | Capacity | Current |
| C20 | 42Ah | 2.10A |
| C10 | 40Ah | 4.00A |
| C5 | 36.4Ah | 7.28A |
| C1 | 25.5Ah | 25.5A |
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)
| Voltage | 10min | 30min | 1h | 3h | 5h | 10h | 20h |
| 1.85V/cell | 83.2 | 36.1 | 22.3 | 9.99 | 6.90 | 3.82 | 2.03 |
| 1.80V/cell | 94.6 | 39.3 | 23.1 | 10.8 | 7.15 | 4.00 | 2.10 |
| 1.60V/cell | 117.8 | 42.1 | 25.5 | 11.5 | 7.66 | 4.18 | 2.19 |
Constant Power Discharge (Watts)
| Voltage | 10min | 30min | 1h | 3h | 5h | 10h | 20h |
| 1.85V/cell | 155.4 | 70.3 | 44.1 | 19.9 | 13.7 | 7.75 | 4.12 |
| 1.80V/cell | 173.9 | 75.9 | 45.4 | 21.5 | 14.3 | 8.10 | 4.26 |
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?
- Space-Efficient: Compact size fits tight installations
- Reliable Performance: Stable output across temperature extremes
- Easy Installation: Standard M6 terminals for quick setup
- Low Maintenance: Sealed design eliminates watering needs
- Proven Safety: Meets international safety standards
ESTEL DJM1240 12V 40Ah Compact Lead Acid Battery Reliable Power Solution for Telecom and Backup Systems
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