Rolls Battery S12 185
The Rolls Battery S12 185 is a battery pack with a nominal voltage of 12, a reserve capacity of 406 Minutes and a weight of 134.5 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
- 25 A
- Capacity, at the 20-hour rate
- 20 HR column: 210
- Reserve capacity
- 406 Minutes
- Maximum charge current, as the maker labels it
- 40 A
- Minutes at 75 A
- 107 Minutes
- Cold cranking amps
- CCA @ -18°C (0°F): 810
- 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): 1013
“Charge Voltage Range 2.45-2.5 V/cell @ 25°C (77°F)”
Source: rollsbattery.com/battery/s12-185
Row from the maker’s page: “Volts” | “FLA SERIES 4000” | “12”
Source: rollsbattery.com/battery/s12-185
Row from the maker’s page: “Container” | “Polypropylene”
Source: rollsbattery.com/battery/s12-185
Row from the maker’s page: “Cells” | “FLA SERIES 4000” | “6”
Source: rollsbattery.com/battery/s12-185
“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” | “25 A”
Source: rollsbattery.com/battery/s12-185
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Reserve Capacity (RC @ 25A)” | “406 Minutes”
Source: rollsbattery.com/battery/s12-185
Row from the maker’s page: “Maximum Charge Current” | “40 A”
Source: rollsbattery.com/battery/s12-185
Row from the maker’s page: “Reserve Capacity (RC @ 75A)” | “107 Minutes”
Source: rollsbattery.com/battery/s12-185
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Float Voltage Range” | “2.25 V/cell @ 25°C (77°F)”
Source: rollsbattery.com/battery/s12-185
“Self-Discharge Rate 5%-10% per month at 25°C (77°F)”
Source: rollsbattery.com/battery/s12-185
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Size and fit
- Weight
- 134.5 Lbs
- Overall dimensions
- L x W x H incl. terminal: 39.1 cm x 17.8 cm x 36.5 cm
- Terminals
- Terminal type: DT
- Stated weight
Weight: 61 kg
MARINE-sheet.pdf · retrieved 8 October 2026
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Weight: 114.5lbs | 52kg
Rolls-Battery-Renewable-Energy.pdf · retrieved 8 October 2026
“S12 185 210 921 DT 15.38” | 39.1cm 7” | 17.8cm 14.38” | 36.5cm 114.5lbs | 52kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/Rolls-Battery-Renewable-Energy.pdf
- Terminal thread
- 5/16"-18
- Group the maker sells it as
- BCI column: 921
“SERIES 4000 S12 185 921 210 810 1013 15.38” x 7” x 14.38” 134.5 Lbs”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“S12 185 210 921 DT 15.38” | 39.1cm 7” | 17.8cm 14.38” | 36.5cm 114.5lbs | 52kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/Rolls-Battery-Renewable-Energy.pdf
The maker’s own documents give different figures
Row from the maker’s page: “Size & Thread” | “5/16"-18”
Source: rollsbattery.com/battery/s12-185
“SERIES 4000 S12 185 921 210 810 1013 39.1 cm x 17.8 cm x 36.5 cm 61 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 185 | Rolls BatteryArchived document
Source: rollsbattery.com/battery/s12-185
Retrieved October 16, 2026
- Archived document
Source: rollsbattery.com/wp-content/uploads/2019/11/Rolls-Battery-Renewable-Energy.pdf
Retrieved October 8, 2026