CSB Battery MSJ-300: 2V 300Ah Telecom-Grade VRLA-AGM Battery

Product Features

VRLA (Valve Regulated Lead Acid) technology
Maintenance-free design with AGM (Absorbent Glass Mat) construction, up to 99% gas recombination efficiency
Pure lead construction with proprietary element formulation
Engineered for high-capacity float charge backup power applications
Manufactured to IEC 60896-21/22:2004, UL1989 certified (MH14533)

Application Scenarios

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

Product parameters

Model：MSJ-300
Voltage：2 Vdc
Nominal Capacity：300 Ah @10hr-rate
Ah Capacity：304.00 (8-Hr 1.75 VPC @ 25°C)
Ah Capacity：314.00 (20-Hr 1.75 VPC @ 25°C)
Ah Capacity：296.00 (8-Hr 1.80 VPC @ 25°C)
Max. Charge Current：90.00 A
Max. Discharge Current：1800 A
Short Circuit Current：5075 A
Internal Resistance：0.33 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：21.80 / 48.05 kg / lb.
Width (W)：150.0±1.5 / 5.91±0.06 mm / in
Height (H)：339.0±2.5 / 13.15±0.10 mm / in
Depth (D)：170.0±2.0 / 6.69±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-300 is a 2V Valve Regulated Sealed Lead Acid battery in the MSJ series. It uses AGM absorbent glass mat technology with a gas recombination efficiency of up to 99% and is maintenance-free. The series is designed for high-capacity float backup power applications such as telecom, and according to the official positioning, it delivers a 2V high-capacity long-life telecom battery with a service life of up to 20 years under float charge at 25°C. In terms of capacity, the MSJ-300 has a nominal capacity of 300Ah (10-hour rate, 1.80VPC@25°C). At 25°C, it provides 304.00Ah at the 8-hour rate at 1.75VPC, 314.00Ah at the 20-hour rate at 1.75VPC, and 296.00Ah at the 8-hour rate at 1.80VPC. The battery's maximum charge current is 90.00A, maximum discharge current is 1800A, short-circuit current is 5075A, and internal resistance is 0.33mΩ. In terms of construction, the MSJ-300 uses a pure lead construction with proprietary formulation elements, and the case is made of flame-retardant ABS (UL 94-V0). The terminal is an I4 threaded copper alloy type compatible with M8 bolts, with a terminal torque of 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. Dimensions: width 150.0±1.5mm, height 339.0±2.5mm, depth 170.0±2.0mm, weight 21.80kg. Charging and temperature conditions: At 25°C, the float charge voltage is 2.21 to 2.25Vdc/battery, and the equalize charge voltage is 2.35Vdc/battery. 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. Self-discharge characteristics: self-discharge is less than 10% after 90 days of storage at 25°C, and storage is possible for up to 6 months; the battery must be fully charged before use, and if the storage temperature exceeds 25°C, it should be charged earlier. The MSJ-300 is manufactured in accordance with IEC 60896-21/22:2004 and is UL1989 recognized (MH14533). Under float charge at 25°C, the design life is up to 20 years; according to the Eurobat (20°C) standard, it achieves a Very Long Life rating of greater than 12 years, making it suitable for applications such as telecom that require long-term float backup.