CSB MSJ-800 2V 800Ah VRLA-AGM Battery for Telecom Backup Power

Product Features

Valve-regulated lead-acid (VRLA) design
Absorbent glass mat (AGM) technology, maintenance-free, with gas recombination efficiency up to 99%
Proprietary element formulation combined with pure lead construction
Engineered for high-capacity float standby power applications
Manufactured in compliance with IEC 60896-21/22:2004 and UL1989 certified (MH14533)

Application Scenarios

Provides DC power backup for communication base stations
Used for standby power supply at fiber access network central offices
DC power supply for microwave relay stations
48V DC systems in telecom equipment rooms
Serves as backup power for broadband access equipment
Backup power support for mobile communication core networks

Product parameters

Model：MSJ-800
Voltage：2 Vdc
Nominal Capacity：800 Ah @10hr-rate
Ah Capacity：808.00 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：840.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：792.00 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：240.00 A
Max. Discharge Current：4800 A
Internal Resistance：0.25 mΩ
Terminal Type：I4 thread copper alloy terminal to accept M8 bolt
Terminal Torque：126±25 Kgf·cm / 109±22 Lbf·in / 12.3±2.5 N·m
Container Material：Flame-retardant ABS (UL 94-V0)
Weight：56.70 / 124.97 kg / lb.
Width (W)：174.0±2.0 / 6.85±0.08 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Depth (D)：373.0±2.5 / 14.69±0.10 mm / in
Design Life：Up to 20 years in standby service at 25°C; Eurobat (20°C): >12 years, Very Long Life
Float Charging Voltage：2.21 ~ 2.25 Vdc/battery
Equalizing Charging Voltage：2.35 Vdc/battery
Operating Temperature：discharge -15°C to 50°C; charge/storage -15°C to 40°C

Product details

The MSJ-800 belongs to CSB's MSJ series and is a 2V VRLA-AGM battery officially positioned as a high-capacity, long-life product for telecom backup power. Under 25°C float charge conditions, its design life is up to 20 years, meeting the Eurobat long-life classification of more than 12 years at 20°C for very long life. The battery has a nominal voltage of 2Vdc and a 10-hour rate nominal capacity of 800Ah at 25°C and 1.80VPC; at 1.75VPC, the 8-hour rate is 808.00Ah and the 20-hour rate is 840.00Ah; at 1.80VPC, the 8-hour rate is 792.00Ah, sufficient to meet the capacity requirements of telecom backup power. This battery uses a valve-regulated sealed lead-acid construction and absorbed glass mat (AGM) technology, with a gas recombination efficiency of up to 99%, and features a maintenance-free design. It is manufactured with a pure lead structure and proprietary formulation, suitable for high-capacity float backup power applications, produced in accordance with IEC 60896-21/22:2004, and recognized under UL1989 (MH14533). Its case is made of flame-retardant ABS material, compliant with UL 94-V0. In terms of electrical parameters, the MSJ-800 has a float charge voltage of 2.21 to 2.25Vdc per cell at 25°C and an equalize charge voltage of 2.35Vdc per cell; the maximum charge current is 240.00A, the maximum discharge current is 4800A, and the internal resistance is only 0.25 mΩ. The terminals are I4 threaded copper alloy type, compatible with M8 bolts, with a torque requirement of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. In terms of dimensions and weight, the battery width is 174.0±2.0 mm, height is 339.0±2.5 mm, depth is 373.0±2.5 mm, and weight is 56.70 kg. For temperature conditions, the nominal temperature is 25°C, the allowable discharge range is -15°C to 50°C, and the allowable charge and storage range is -15°C to 40°C. Self-discharge characteristics are: less than 10% self-discharge after 90 days at 25°C; storage for up to 6 months at 25°C, but the battery must be fully charged before use, and if the storage temperature exceeds 25°C, charging is required earlier. The MSJ-800 is suitable for float backup power applications in the telecom field, and its high-capacity and long-life design helps reduce replacement frequency. During installation, tighten the M8 bolts according to the terminal torque specification and set the corresponding voltage according to float or equalize charge mode to ensure reliable battery operation within the recommended temperature range.