
EnerRocket ES 42-12 SMF VRLA Battery
The EnerRocket ES 42-12 is a 12V 42Ah sealed maintenance-free (SMF) VRLA battery from the Long Life Series, designed for dependable standby power in UPS systems, telecommunication networks, fire alarm and security installations, and medical equipment. Built with Absorptive Glass Mat (AGM) technology and non-spillable sealed construction, it delivers a 10-year design life as per EUROBAT standards, with low internal resistance of 9.0 mΩ enabling fast charging and high current delivery. Heavy-duty optimised grids, a flame-retardant ABS container and completely maintenance-free operation make the ES 42-12 a reliable long-term power source for critical backup applications.
- Model : ES 42-12
- Nominal Voltage : 12 V
- Nominal Capacity (25°C) : 42 Ah @ 20 Hr rate
- Capacity @ 10 Hr Rate : 40 Ah
- Capacity @ 5 Hr Rate : 37.55 Ah
- Design Life : 10 Years (as per EUROBAT standards)
- Series : Long Life Series
- Battery Type : SMF VRLA, AGM
- Internal Resistance (25°C, 100% charge) : ≤ 9.0 mΩ
- Self Discharge (20°C) : 1 month, 97% remaining capacity
- Maximum Discharge Current (25°C) : 400 A (5 sec)
- Maximum Charging Current : 16 A
- Short Circuit Current : 950 A
- Charging Voltage — Standby Use (25°C) : 13.4 to 13.8 V, temp. compensation −20 mV/°C
- Charging Voltage — Cyclic Use (25°C) : 14.4 to 14.7 V, temp. compensation −30 mV/°C
- Operating Temperature — Discharge : −20°C to 60°C
- Operating Temperature — Charge : −10°C to 60°C
- Storage Temperature : −20°C to 60°C
- Normal Operating Temperature : 25°C ± 3°C
- Length : 197.5 mm
- Width : 165.5 mm
- Height / Total Height : 170 mm
- Weight : 12.8 kg ± 5%
- Terminal : M6
- Container Material : ABS (FR-V0 flame retardant optional)
- Compliance : IEC 60896 Part 21 & 22, BS 6290-4, EUROBAT High Performance, ISO 9001
- Non-spillable sealed construction for safe operation in any orientation
- Absorptive Glass Mat (AGM) system for efficient electrolyte retention
- Sealed lead acid, completely maintenance-free — no water topping required
- ABS container construction with optional FR-V0 flame-retardant grade
- Gas recombination technology minimises electrolyte loss
- Venting system maintains low internal pressure for added safety
- Low internal resistance of 9.0 mΩ supports fast charging and high current delivery
- Low self-discharge retains 97% capacity after one month of storage
- Heavy-duty, highly optimised grids for extended service life
- High power output with M6 terminal design engineered for high current
- Wide operating temperature range from −20°C to 60°C on discharge
- 10-year design life as per EUROBAT standards
- Suitable for UPS systems, telecommunication systems, fire alarm safety & security systems and medical equipment
- Manufactured under ISO 9001 quality assurance and compliant with IEC 60896 Part 21 & 22 and BS 6290-4
Technical support is available to you in the event of a problem with your UPS
Technical Help Desk
- line: 9311661130
- Email: [email protected]







