Telecommunications Battery CSB MSJ-500 (2V 500Ah) VRLA-AGM

Product Features

Valve-regulated lead-acid (VRLA) battery
Maintenance-free; with absorbent glass mat (AGM) technology, gas recombination efficiency up to 99%
Constructed with a pure lead structure and proprietary elements
Specifically developed for high-capacity float standby power requirements
Manufacturing process complies with IEC 60896-21/22:2004 and has obtained UL1989 recognition (MH14533)

Application Scenarios

DC backup power for communication base stations
Backup power deployed at the central office of fiber access networks
DC power for microwave relay stations
48V DC system for telecom equipment rooms
Backup power for broadband access equipment
Backup power for mobile communications core networks

Product parameters

Model：MSJ-500
Voltage：2 Vdc
Nominal Capacity：500 Ah @10hr-rate
Ah Capacity：506.40 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：524.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：493.60 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：150.00 A
Max. Discharge Current：3000 A
Short Circuit Current：9953 A
Internal Resistance：0.28 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：36.50 / 80.45 kg / lb.
Width (W)：171.0±2.0 / 6.73±0.08 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Depth (D)：241.0±2.5 / 9.49±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 official application focus of the CSB MSJ-500 is the telecommunications field, and it is classified under the MSJ series. This series is part of a VRLA 2V high-capacity telecommunications battery product line aimed at extending service life; under standby float conditions, the design life can reach 20 years. Its type is a 2V VRLA-AGM valve-regulated sealed lead-acid battery. Internally, it uses valve-regulated sealed lead-acid construction and AGM (Absorbent Glass Mat) technology, with gas recombination efficiency of up to 99%. It is a maintenance-free design and uses pure lead material and proprietary elements. Tested at 1.80VPC, 25°C, 10-hour rate, the nominal capacity of the MSJ-500 is 500Ah. The other rate capacities are as follows: when discharged at 8-hour rate, 1.75VPC, 25°C, it can deliver 506.40Ah; at 20-hour rate, 1.75VPC, 25°C, it is 524.00Ah; at 8-hour rate, 1.80VPC, 25°C, it is 493.60Ah. The charge current does not exceed 150.00A, and the discharge current does not exceed 3000A; short-circuit current is 9953A, and internal resistance is 0.28mΩ. For voltage and temperature settings, at 25°C the float voltage range is 2.21 to 2.25Vdc/battery, and the equalization voltage is 2.35Vdc/battery. The nominal operating temperature is 25°C; allowable discharge temperature is -15°C to 50°C; allowable charge and storage temperature is -15°C to 40°C. Regarding self-discharge, it is below 10% after 90 days at 25°C, and can be stored for up to 6 months; it should be fully charged before being put into service. If the storage temperature exceeds 25°C, supplementary charging is required in advance. In terms of structural design, the MSJ-500 uses copper alloy I4 threaded terminals and is compatible with M8 bolts. Terminal tightening torque is 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. The case material is flame-retardant ABS, meeting UL 94-V0. Weight is 36.50kg (80.45 lb); width is 171.0±2.0mm, height is 339.0±2.5mm, and depth is 241.0±2.5mm. The product is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). The MSJ-500 can be used in high-capacity float standby backup power applications in the telecommunications field. Under 25°C float standby conditions, the design life is 20 years; according to the Eurobat standard, it exceeds 12 years at 20°C, reaching the Very Long Life level. With maintenance-free AGM technology and valve-regulated sealed construction, maintenance workload in float standby applications is reduced, making it suitable for telecommunications facilities that require high backup power reliability and long-term operation.