CSB MSV-650 Telecom Battery: 2V 650Ah VRLA-AGM Valve-Regulated Sealed Lead-Acid Battery

Product Features

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

Application Scenarios

48V DC systems for telecom equipment rooms
Backup power for broadband access equipment
DC power supply for microwave relay stations
Standby power at central offices of fiber access networks
Backup power for mobile communication core networks
DC power as backup for communication base stations

Product parameters

Model：MSV-650
Voltage：2 Vdc
Nominal Capacity：650 Ah @10hr-rate
Ah Capacity：636.80 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：692.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：624.00 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：195.00 A
Max. Discharge Current：3900 A
Internal Resistance：0.38 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：41.40 / 91.25 kg / lb.
Length (L)：307.0±2.5 / 12.09±0.10 mm / in
Width (W)：171.0±2.0 / 6.73±0.08 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Design Life：Up to 15 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 MSV-650 is a 2V VRLA-AGM valve-regulated sealed lead-acid battery in the MSV series, officially designated for telecom applications. The series is positioned as a VRLA 2V high-capacity, long-service-life telecom battery line suitable for large emergency and communication scenarios. The battery has a nominal voltage of 2 Vdc; at 1.80 VPC and 25°C, the 10-hour rate nominal capacity reaches 650 Ah; at the 20-hour rate, 1.75 VPC, and 25°C, the capacity is 692.00 Ah; at the 8-hour rate, 1.75 VPC, and 25°C, it is 636.80 Ah; at the 8-hour rate, 1.80 VPC, and 25°C, it is 624.00 Ah. In terms of electrical performance, the MSV-650 has a maximum charge current of 195.00 A, a maximum discharge current of 3900 A, and an internal resistance of 0.38 mΩ. At 25°C, the float voltage is 2.21 to 2.25 Vdc/battery, and the equalize voltage is 2.35 Vdc/battery. The terminals are I4 threaded copper alloy terminals compatible with M8 bolts, with a terminal torque of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. In terms of dimensions, the battery is 307.0±2.5 mm long, 171.0±2.0 mm wide, and 339.0±2.5 mm high, and weighs 41.40 kg. The case material is flame-retardant ABS meeting UL 94-V0. Operating temperature: nominal 25°C, discharge range -15°C to 50°C, charge and storage range -15°C to 40°C. The MSV-650 uses a valve-regulated sealed lead-acid structure and absorbed glass mat AGM technology, with a gas recombination efficiency of up to 99%, and is maintenance-free. Its pure lead construction and proprietary element formulation make it suitable for high-capacity float backup power applications. The product is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). Under 25°C float conditions, the design life can reach 15 years, and under the Eurobat (20°C) standard it exceeds 12 years, placing it in the very long life category. In terms of storage characteristics, the MSV-650 has a low self-discharge rate, with less than 10% self-discharge over 90 days at 25°C. It can be stored in a 25°C environment for up to 6 months and must be fully charged before use; if the storage temperature exceeds 25°C, charging is required earlier. These features make the battery suitable for telecom and other applications requiring long-term float backup.