MSJ-500 2V 500Ah VRLA-AGM Telecom Battery

Product Features

Valve Regulated Lead Acid (VRLA) Battery
Maintenance-Free, Absorbent Glass Mat (AGM) Technology for Efficient Gas Recombination of up to 99%
Pure Lead Construction and Proprietary Elements
Designed for High Capacity Float Service Standby Power Applications
Built in Accordance with IEC 60896-21/22:2004 and UL1989 Recognized (MH14533)

Application Scenarios

Telecom base station DC power backup
Optical access network central office backup
Microwave relay station DC supply
Telecom room 48V DC system
Broadband access equipment backup power
Mobile core network backup

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 CSB MSJ-500 belongs to the MSJ series; its product type is a 2V VRLA-AGM valve-regulated sealed lead-acid battery, and its official application area is telecommunications. The series is positioned as a VRLA 2V high-capacity, extended-life telecom battery series, providing a design life of up to 20 years in standby float service. The battery uses a valve-regulated sealed lead-acid structure and absorbed glass mat AGM technology, with gas recombination efficiency of up to 99%; it is a maintenance-free design and uses pure lead construction with proprietary elements. In terms of capacity, the MSJ-500 has a nominal capacity of 500Ah at 1.80VPC, 25°C, 10-hour rate. Other capacity data include: 506.40Ah at 8-hour rate, 1.75VPC, 25°C; 524.00Ah at 20-hour rate, 1.75VPC, 25°C; and 493.60Ah at 8-hour rate, 1.80VPC, 25°C. The battery's maximum charge current is 150.00A, maximum discharge current is 3000A, short-circuit current is 9953A, and internal resistance is 0.28mΩ. For electrical and temperature parameters, the float charge voltage is 2.21 to 2.25Vdc/battery (25°C), and the equalizing charge voltage is 2.35Vdc/battery (25°C). The nominal operating temperature is 25°C, the discharge temperature range is -15°C to 50°C, and the charge and storage temperature range is -15°C to 40°C. For self-discharge, it is less than 10% after 90 days at 25°C, and it can be stored for up to 6 months; a full charge is required before use, and if the storage temperature is above 25°C, it should be charged sooner. Structurally, the MSJ-500 uses an I4 threaded copper alloy terminal that accepts an M8 bolt, with a terminal torque of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. The case material is flame-retardant ABS, compliant with UL 94-V0. The weight is 36.50kg (80.45 lb), width 171.0±2.0mm, height 339.0±2.5mm, and depth 241.0±2.5mm. The product is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). The MSJ-500 is suitable for high-capacity float standby power scenarios in the telecommunications field. Its design life reaches up to 20 years in 25°C standby float service, and more than 12 years at 20°C under the Eurobat standard, placing it in the Very Long Life category. Maintenance-free AGM technology and valve-regulated sealed construction help reduce maintenance requirements in float standby applications, making it suitable for communication facilities that require long-term reliable backup power.