Rolls Battery S12 31
The Rolls Battery S12 31 is a battery pack with a nominal voltage of 12, a reserve capacity of 216 Minutes and a weight of 65 Lbs.
Last updated: 27 October 2026
Battery and charging
- Charging voltage range
- 2.45-2.5 V/cell @ 25°C (77°F)
- Voltage
- 12
- Case material
- Polypropylene
- Number of cells
- 6
- Battery type
- Flooded (table headed MARINE, FLOODED)
- Recommended charging
- 15 A
- Capacity, at the 20-hour rate
- 20 HR column: 130
- Reserve capacity
- 216 Minutes
- Maximum charge current, as the maker labels it
- 25 A
- Minutes at 75 A
- 64 Minutes
- Cold cranking amps
CCA @ -18°C (0°F): 620
MARINE-sheet.pdf · retrieved 8 October 2026
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
670
S12 31 | Rolls Battery · retrieved 15 October 2026
“Cold Crank Amps (CCA) 0°F / -18°C 670”
Source: rollsbattery.com/battery/s12-31
- Float voltage
- 2.25 V/cell @ 25°C (77°F)
- How fast it loses charge sitting idle
- 5%-10% per month at 25°C (77°F)
- Cranking amps, hot, marine and cold
- MCA @ 0°C (32°F): 775
“Charge Voltage Range 2.45-2.5 V/cell @ 25°C (77°F)”
Source: rollsbattery.com/battery/s12-31
Row from the maker’s page: “Volts” | “FLA SERIES 4000” | “12”
Source: rollsbattery.com/battery/s12-31
Row from the maker’s page: “Container” | “Polypropylene”
Source: rollsbattery.com/battery/s12-31
Row from the maker’s page: “Cells” | “FLA SERIES 4000” | “6”
Source: rollsbattery.com/battery/s12-31
“FLOODED MODEL BCI 20 HR CCA MCA DIMENSIONS WEIGHT”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Recommended Charge Current” | “15 A”
Source: rollsbattery.com/battery/s12-31
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Reserve Capacity (RC @ 25A)” | “216 Minutes”
Source: rollsbattery.com/battery/s12-31
Row from the maker’s page: “Maximum Charge Current” | “25 A”
Source: rollsbattery.com/battery/s12-31
Row from the maker’s page: “Reserve Capacity (RC @ 75A)” | “64 Minutes”
Source: rollsbattery.com/battery/s12-31
The maker’s own documents give different figures
Row from the maker’s page: “Float Voltage Range” | “2.25 V/cell @ 25°C (77°F)”
Source: rollsbattery.com/battery/s12-31
“Self-Discharge Rate 5%-10% per month at 25°C (77°F)”
Source: rollsbattery.com/battery/s12-31
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Size and fit
- Weight
- 65 Lbs
- Overall dimensions
- L x W x H incl. terminal: 33.0 cm x 17.1 cm x 24.1 cm
- Terminals
- Terminal type: DT
- Stated weight
- Weight: 29.5 kg
- Terminal thread
- 5/16"-18
- Group the maker sells it as
- BCI column: 31
“SERIES 4000 S12 31 31 130 620 775 13” x 6.75” x 9.50” 65 Lbs”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“S12 31 130 31 DT 13” | 33cm 6.75” | 17.1cm 9.50” | 24.1cm 65lbs | 29.5kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/Rolls-Battery-Renewable-Energy.pdf
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Size & Thread” | “5/16"-18”
Source: rollsbattery.com/battery/s12-31
“SERIES 4000 S12 31 31 130 620 775 33.0 cm x 17.1 cm x 24.1 cm 29.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Sources
- Archived document
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Retrieved October 8, 2026
- S12 31 | Rolls BatteryArchived document
Source: rollsbattery.com/battery/s12-31
Retrieved October 16, 2026
- Archived document
Source: rollsbattery.com/wp-content/uploads/2019/11/Rolls-Battery-Renewable-Energy.pdf
Retrieved October 8, 2026