CSB MSJ-400 2V 400Ah VRLA-AGM Battery for Telecom Backup Power

Product Features

Category: Valve-regulated lead-acid (VRLA) battery
With AGM (Absorbent Glass Mat) technology, gas recombination efficiency can reach up to 99%, and no routine maintenance is required
Pure lead is used as the construction material, with proprietary elements incorporated
Specifically designed for high-capacity float-charge standby power applications
Manufactured according to IEC 60896-21/22:2004 and UL1989 recognized (MH14533)

Application Scenarios

DC power backup for communication base stations
Standby power for optical access network central offices
DC power supply for microwave relay stations
48V DC system for telecom equipment rooms
Backup power for broadband access equipment
Standby power for mobile communication core networks

Product parameters

Model：MSJ-400
Voltage：2 Vdc
Nominal Capacity：400 Ah @10hr-rate
Ah Capacity：405.60 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：420.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：394.40 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：120.00 A
Max. Discharge Current：2400 A
Short Circuit Current：6065 A
Internal Resistance：0.30 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：28.60 / 63.03 kg / lb.
Width (W)：170.0±2.0 / 6.69±0.08 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Depth (D)：197.0±2.0 / 7.76±0.08 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

In float standby power scenarios for telecommunications equipment rooms, the CSB MSJ-400 supplies power to high-capacity backup systems as a 2V cell. It belongs to the MSJ series and is a 2V valve-regulated sealed lead-acid battery for high-capacity, long float life backup power applications; this model uses AGM absorbent glass mat technology, with gas recombination efficiency of up to 99%, and is maintenance-free by design. Its nominal voltage is 2Vdc, and its long-life design and maintenance-free AGM construction make it suitable for applications requiring long-term float operation. In terms of construction, the MSJ-400 case is made of flame-retardant ABS (UL 94-V0), with a pure lead internal construction and proprietary formulation elements. The terminals use I4 threaded copper alloy terminals and can accept M8 bolts; terminal torque ranges include 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. Its width, height, and depth are 170.0±2.0 mm, 339.0±2.5 mm, and 197.0±2.0 mm, respectively, and its weight is 28.60 kg (63.03 lb). For operating temperature, the nominal temperature is 25°C; discharge can be performed from -15°C to 50°C, and charging and storage allow -15°C to 40°C. For design life, up to 20 years in float standby service at 25°C; according to the Eurobat (20°C) standard, it exceeds 12 years, placing it in the Very Long Life class. The product is manufactured in accordance with IEC 60896-21/22:2004 and has obtained UL1989 recognition (MH14533). Capacity performance varies with discharge conditions: at 1.80VPC, 25°C, the nominal capacity at the 10-hour rate is 400Ah, and at the 8-hour rate is 394.40Ah; at 1.75VPC, 25°C, the 8-hour rate is 405.60Ah, and the 20-hour rate is 420.00Ah. For electrical parameters, the MSJ-400 has a maximum charge current of 120.00A, maximum discharge current of 2400A, short-circuit current of 6065A, and internal resistance of 0.30 mΩ. At 25°C, the float voltage is 2.21 to 2.25 Vdc/battery, and the equalization voltage is 2.35 Vdc/battery. For self-discharge, after 90 days of storage at 25°C, the remaining capacity is greater than 90%; under 25°C conditions, it can be stored for up to 6 months, and must be fully charged before use; if the storage temperature is higher than 25°C, supplementary charging should be performed sooner. With the above features, the MSJ-400 is suitable for float standby power in telecommunications equipment rooms, providing power support for high-capacity backup systems in the form of 2V cells, and its long-life design and maintenance-free AGM construction meet the requirements of long-term float operation.