CSB XPL3500FR 12V 85Ah Sealed Lead-Acid Battery, Flame-Retardant Case

What is the CSB XPL3500FR?

The CSB XPL3500FR is a 12 V, 85 Ah valve-regulated lead-acid (VRLA) battery with absorbent glass mat (AGM) construction from the CSB XPL series (Extreme Power, Long Life). It is sealed and maintenance-free: it never needs water.

CSB designs this series for high-rate UPS and 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 XPL3500FR?

Figures published by CSB in the XPL3500 datasheet (2026 edition), with the CSB price list attributes marked:

Nominal voltage: 12 V
Nominal capacity (CSB price list): 85 Ah
Watts per cell, 15 minutes to 1.67 V/cell, 25 °C: 318.67 W
Maximum charge current: 29.2 A
Maximum discharge current: 750 A
Internal resistance: approx. 3.83 mΩ
Terminal: I2 threaded insert for M6 bolt
Container: flame-retardant polypropylene (PP), UL 94-V0 (this part number)
Flame-retardant case: standard on this part number (CSB price list)
Weight, approx.: 56.86 lb (25.8 kg)
Dimensions (L x W x H): 261 x 168.5 x 213.5 mm (10.28 x 6.63 x 8.41 in)
Design life: up to 10 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: 13.5 – 13.8 V per battery at 25 °C (77 °F)
Equalize / cycle charging voltage: 14.4 – 15.0 V per battery at 25 °C (77 °F)
Standards (CSB datasheet): IEC 60896-21/22:2004, UL1973 Listed (MH66728) and UL1989 Recognized (MH14533)

How much power does the CSB XPL3500FR deliver in a 15-minute discharge?

CSB’s constant-current table gives 167 A for 15 minutes to 1.67 V/cell at 25 °C, and the constant-power table gives 1912 W per battery to the same end voltage. These are the figures to size a UPS or standby string against a 15-minute runtime.

How do I request a quote for the CSB XPL3500FR?

Request a quote by the part number XPL3500FR. 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.