Telecommunications Battery: CSB MU900S 2V 900Ah VRLA-AGM

Product Features

VRLA-type valve-regulated lead-acid battery
Absorbent glass mat (AGM) technology makes it maintenance-free, with gas recombination efficiency up to 99%
Construction consists of pure lead and proprietary elements
Designed for high-capacity float standby power applications
Manufactured to IEC 60896-21/22:2004; UL1989 recognition (MH14533) has also been obtained

Application Scenarios

Long-duration backup for regional aggregation equipment rooms
DC power supply for large communications hubs
Communication base stations requiring ultra-long backup time
Energy storage backup for islands and remote sites
DC backup for emergency command centers
High-capacity backup power for core network equipment rooms

Product parameters

Model：MU900S
Voltage：2 Vdc
Nominal Capacity：900 Ah @10hr-rate
Ah Capacity：888.00 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：1032.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：872.00 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：270.00 A
Max. Discharge Current：5400 A
Short Circuit Current：10580 A
Internal Resistance：0.36 mΩ
Terminal Type：I3 thread copper alloy terminal to accept M10 bolt
Terminal Torque：249±50 Kgf·cm / 216±43 Lbf·in / 24.4±4.9 N·m
Container Material：Flame-retardant 聚丙烯 (UL 94-V0)
Weight：55.90 / 123.20 kg / lb.
Length (L)：303.0±3.0 / 11.93±0.12 mm / in
Width (W)：172.0±3.0 / 6.77±0.12 mm / in
Depth (D)：497.0±3.0 / 19.57±0.12 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

MU900S is a 2V valve-regulated sealed lead-acid battery in the CSB MU product line. Its separator uses absorbent glass fiber (AGM), achieving up to 99% gas recombination; no water addition is required during normal operation, and maintenance needs are low. The series evolved from MSV and MSJ, mainly serving larger-capacity float standby requirements, and its officially listed application is telecommunications. Capacity and current: At 25°C and 1.80VPC, the nominal capacity at the 10-hour rate reaches 900Ah; at the same 25°C, the 8-hour rate at 1.75VPC is 888.00Ah and the 20-hour rate is 1032.00Ah; the 8-hour rate at 1.80VPC is 872.00Ah. Maximum charge current is 270.00A, maximum discharge current is 5400A, short-circuit current is 10580A, and internal resistance is 0.36 mΩ. Temperature and charging parameters: nominal operating temperature is 25°C; discharge is allowed from -15°C to 50°C, while charging and storage are allowed from -15°C to 40°C. For float charging at 25°C, the voltage per battery should be set at 2.21 Vdc to 2.25 Vdc; for equalizing charge, it is 2.35 Vdc per battery. Self-discharge performance: when stored at 25°C for 90 days, loss is less than 10%, and storage can last up to 6 months; fully charge before putting into operation; if the storage environment exceeds 25°C, recharge is required earlier. Materials and mechanical structure: The battery is made with pure lead and a proprietary formula; the case uses flame-retardant polypropylene, meeting UL 94-V0; the terminals are I3 threaded copper alloy, can be fitted with M10 bolts, and the torque specification is 249±50 Kgf·cm, 216±43 Lbf·in, or 24.4±4.9 N·m. External dimensions are 303.0±3.0 mm long, 172.0±3.0 mm wide, and 497.0±3.0 mm deep; weight is 55.90 kg (123.20 lb). Life and compliance: Design life under 25°C float standby conditions can reach 20 years; according to the Eurobat 20°C standard, it is an ultra-long-life product exceeding 12 years. Manufactured in accordance with IEC 60896-21/22:2004, recognized under UL1989, file number MH14533. Therefore, DC power supply systems such as telecommunications that require high capacity and long-duration float standby can include it in selection.