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

Product Features

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

Application Scenarios

Backup power for mobile communication core networks
48V DC systems in telecom equipment rooms
Standby power for broadband access equipment
DC power for microwave relay stations
Central office backup power for optical fiber access networks
DC backup for communication base stations

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 MSJ-300 in the MSJ series is a 2V valve-regulated sealed lead-acid battery that uses AGM absorbent glass mat technology, with a gas recombination efficiency of up to 99%, and is a maintenance-free design. This series targets applications such as telecommunications that require high-capacity float standby power, and is officially positioned as 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 specifications, the nominal capacity of the MSJ-300 is 300Ah (1.80VPC@25°C, 10-hour rate). At 25°C, it is 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. In addition, the maximum charging current of the battery is 90.00A, the maximum discharge current is 1800A, the short-circuit current is 5075A, and the internal resistance is only 0.33mΩ. In terms of structural design, the MSJ-300 uses a pure lead construction with proprietary formulation elements, and the case uses flame-retardant ABS (UL 94-V0) material. The terminal specification is an I4 threaded copper alloy terminal, compatible with M8 bolts, and the terminal torque is 126±25 Kgf·cm, 109±22 Lbf·in, or 12.3±2.5 N·m. In terms of dimensions, the width is 150.0±1.5mm, the height is 339.0±2.5mm, the depth is 170.0±2.0mm, and the overall weight is 21.80kg. In terms of charging and temperature conditions, at 25°C, the float charge voltage is 2.21 to 2.25Vdc/battery, and the equalization 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 charging and storage temperature range is -15°C to 40°C. In terms of self-discharge performance, self-discharge is less than 10% after 90 days of storage at 25°C, and it can be stored for up to 6 months; it must be fully charged before use, and if the storage temperature exceeds 25°C, it needs to be charged in advance. The MSJ-300 is manufactured in accordance with the IEC 60896-21/22:2004 standard and has obtained UL1989 recognition (MH14533). Under float charge at 25°C, its design life can reach 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 telecommunications and other applications requiring long-term float standby.