CSB MSJ800 2V 870Ah VRLA Battery Cell, Flame-Retardant Case

What is the CSB MSJ800?

The CSB MSJ800 is a 2 V, 870 Ah valve-regulated lead-acid (VRLA) battery with absorbent glass mat (AGM) construction from the CSB MSJ series (2 V High Capacity). It is sealed and maintenance-free: it never needs water.

CSB designs this series for high-capacity float service standby power. This part number has a flame-retardant (UL 94-V0) case as standard.

CSB lists this part as a non-stock item, so availability and minimum order quantity are confirmed with your quote.

What are the specifications of the CSB MSJ800?

Figures published by CSB in the MSJ-800 datasheet (2026 edition), with the CSB price list attributes marked:

Nominal voltage: 2 V
Nominal capacity (CSB price list): 870 Ah
Rated capacity, 20-hour rate to 1.75 V/cell, 25 °C: 840 Ah
Rated capacity, 8-hour rate to 1.75 V/cell, 25 °C: 808 Ah
Maximum charge current: 240 A
Maximum discharge current: 4800 A
Internal resistance: approx. 0.25 mΩ
Terminal: I4 threaded insert for M8 bolt
Container: flame-retardant ABS, UL 94-V0
Flame-retardant case: standard on this part number (CSB price list)
Weight, approx.: 124.97 lb (56.7 kg)
Dimensions (W x D x H): 174 x 373 x 339 mm (6.85 x 14.69 x 13.15 in)
Design life: up to 20 years in standby service at 25 °C; Eurobat (20 °C) classification: >12 years, very long life
Discharge temperature range: -15 to 50 °C
Float charging voltage: 2.21 – 2.25 V per cell at 25 °C (77 °F)
Equalize / cycle charging voltage: 2.35 V per cell at 25 °C (77 °F)
Standards (CSB datasheet): IEC 60896-21/22:2004, UL1973 Listed (MH66728) and UL1989 Recognized (MH14533)

How do I request a quote for the CSB MSJ800?

Request a quote by the part number MSJ800. Tell us the quantity you need and, where CSB lists more than one terminal or case option, which one. We confirm price, availability and lead time with the quote.