Rolls Battery 8 HHG 21P
The Rolls Battery 8 HHG 21P is a battery pack with a reserve capacity of 552 Minutes and a weight of 118 Lbs.
Last updated: 27 October 2026
Battery and charging
- Charging voltage range
- 2.45-2.5 V/cell @ 25°C (77°F)
- Battery type
- Flooded (table headed MARINE, FLOODED)
- Capacity, at the 20-hour rate
- 20 HR column: 230
- Reserve capacity
- 552 Minutes
- Minutes at 75 A
- 184 Minutes
- Cold cranking amps
- CCA @ -18°C (0°F): 1033
- 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): 1291
Row from the maker’s page: “Charge Voltage Range” | “2.45-2.5 V/cell @ 25°C (77°F)”
Source: rollsbattery.com/battery/8-hhg-21p
“FLOODED MODEL BCI 20 HR CCA MCA DIMENSIONS WEIGHT”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Reserve Capacity (RC @ 25A)” | “552 Minutes”
Source: rollsbattery.com/battery/8-hhg-21p
Row from the maker’s page: “Reserve Capacity (RC @ 75A)” | “184 Minutes”
Source: rollsbattery.com/battery/8-hhg-21p
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 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/8-hhg-21p
Row from the maker’s page: “Self-Discharge Rate” | “5%-10% per month at 25°C (77°F)”
Source: rollsbattery.com/battery/8-hhg-21p
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Size and fit
- Weight
- 118 Lbs
- Overall dimensions
- L x W x H incl. terminal: 54.0 cm x 18.7 cm x 28.3 cm
- Terminals
- Flag L
- Stated weight
- Weight: 53.5 kg
- Terminal thread
- 5/16"-18
- Group the maker sells it as
- BCI column: SPEC
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 21.25” x 7.38” x 11.13” 118 Lbs”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 kg”
Source: rollsbattery.com/wp-content/uploads/2019/11/MARINE-sheet.pdf
Row from the maker’s page: “Terminal Type” | “Flag L”
Source: rollsbattery.com/battery/8-hhg-21p
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 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/8-hhg-21p
“SERIES 4000 8 HHG 21P SPEC 230 1033 1291 54.0 cm x 18.7 cm x 28.3 cm 53.5 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
- 8 HHG 21P | Rolls BatteryArchived document
Source: rollsbattery.com/battery/8-hhg-21p
Retrieved October 16, 2026