CSB GPL12520 12V 52Ah Sealed Lead-Acid Battery

What is the CSB GPL12520?

The CSB GPL12520 is a 12 V, 52 Ah valve-regulated lead-acid (VRLA) battery with absorbent glass mat (AGM) construction from the CSB GPL series (General Purpose, Long Life). It is sealed and maintenance-free: it never needs water.

CSB designs this series for float service standby power. A flame-retardant case is available on request.

What are the specifications of the CSB GPL12520?

Figures published by CSB in the GPL12520 datasheet (2026 edition), with the CSB price list attributes marked:

Nominal voltage: 12 V
Nominal capacity (CSB price list): 52 Ah
Rated capacity, 20-hour rate to 1.75 V/cell, 25 °C: 52 Ah
Rated capacity, 8-hour rate to 1.75 V/cell, 25 °C: 49.36 Ah
Maximum charge current: 15.6 A
Maximum discharge current: 500 A
Internal resistance: approx. 5.1 mΩ
Terminal: I2 threaded insert for M6 bolt
Container: polypropylene (PP), UL 94-HB; flame-retardant UL 94-V0 case available on request
Flame-retardant case: available on request (CSB price list)
Weight, approx.: 39.23 lb (17.8 kg)
Dimensions (L x W x H): 228 x 138.4 x 206.3 mm (8.98 x 5.45 x 8.12 in)
Case / group size (CSB price list): G22NF
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 GPL12520 deliver in a 15-minute discharge?

CSB’s constant-current table gives 110 A for 15 minutes to 1.67 V/cell at 25 °C, and the constant-power table gives 1235 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 GPL12520?

Request a quote by the part number GPL12520. 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.