MSJ-400 2V 400Ah VRLA-AGM Telecom Standby 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-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

The CSB MSJ-400 belongs to the MSJ series of 2V valve-regulated sealed lead-acid batteries, featuring AGM absorbed glass mat technology with gas recombination efficiency of up to 99% and a maintenance-free design. This series targets high-capacity, long float life standby power applications in the telecommunications field, with a nominal voltage of 2Vdc and a nominal capacity of 400Ah at the 10-hour rate under 1.80VPC, 25°C; at 1.75VPC, 25°C, the 8-hour rate is 405.60Ah and the 20-hour rate is 420.00Ah; at 1.80VPC, 25°C, the 8-hour rate is 394.40Ah. In terms of electrical performance, the MSJ-400 has a maximum charge current of 120.00A, a maximum discharge current of 2400A, a short-circuit current of 6065A, and an internal resistance of 0.30 mΩ. The float charge voltage is 2.21 to 2.25 Vdc/battery (25°C), and the equalizing charge voltage is 2.35 Vdc/battery (25°C). Regarding self-discharge, the remaining capacity after 90 days of storage at 25°C is greater than 90%, and it can be stored at 25°C for up to 6 months, requiring a full charge before use; if the storage temperature is above 25°C, recharge should be performed sooner. Structurally, the MSJ-400 uses pure lead construction with proprietary formulation elements, and the case material is flame-retardant ABS (UL 94-V0). The terminal is 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 dimensions are 170.0±2.0 mm in width, 339.0±2.5 mm in height, and 197.0±2.0 mm in depth, with a weight of 28.60 kg (63.03 lb). Regarding operating temperature, the nominal 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. In terms of design life, it can reach 20 years in float standby service at 25°C, and greater than 12 years under the Eurobat (20°C) standard, placing it in the Very Long Life category. The product is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). Based on the above characteristics, the MSJ-400 is suitable for float standby power applications in telecommunications equipment rooms, providing power support for high-capacity standby systems in 2V cell form, and its long-life design and maintenance-free AGM construction make it suitable for occasions requiring long-term float operation.