Rolls Bateries

Rolls Series 5 S12-128 AGM Deep Cycle Battery

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  • Regular price £257.99 Including VAT
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Deep cycle refers to applications that typically discharge 60-80% of the battery capacity. The Rolls S Series S12-128 AGM Deep Cycle AGM battery features thick plates with a high density active material. This design allows for reserve energy to be stored deep within the battery plates and released during slow discharge. The Rolls AGM range are sealed, non hazardous and completely maintenance free and?will suit the customer looking for a long reliable, maintenance free service life.

Rolls has designed a Deep Cycle VRLA battery with high reserve capacity, long cycle life and low internal resistance, while achieving superior cranking performance. Rolls AGM batteries are the smart choice for demanding renewable applications.
They are designed and built differently than standard batteries. They use more lead, heavier plates and other proprietary materials that enable them to deliver more power and capacity over many life cycles.

Weight 32 kg 70.5 lbs
Length 32.8 cm 12.91"
Width 17.5 cm 6.89"
Height Inc. Term. 23.7 cm 9.33"
Product measurements & weights are calculated based on sample data. Individual specifications are subject to vary due to the manufacturing process, battery components & electrolyte levels.
Container ABS
Cover ABS
Handles Nylon Strap



Series AGM-S Warranty See Warranty Terms
Volts 12 BCI Grp 31
Cells 6
Terminal Type DT
Included Hardware Stainless Steel Nuts & Bolts
Size & Thread DT


Charge Voltage Range 14.5-14.9 V/cell @ 25°C (77°F)
Float Voltage Range 13.6-13.8 V/cell @ 25°C (77°F)
Recommended Charge Current 25 A
Maximum Charge Current 35 A
Self-Discharge Rate Less than 2% per month at 25°C (77°F)
Internal Resistance


Cold Crank Amps (CCA) 0°F / -18°C 800
Marine Crank Amps (MCA) 32°F / 0°C 1000
Reserve Capacity (RC @ 25A) 220 Minutes
Reserve Capacity (RC @ 75A) 70 Minutes
Capacity Affect by Temperature 40°C
102% 100% 85% 65%


Hour Rate Capacity / AMP Hour Current / AMPs
@ 100 Hour Rate 128 AH 1.28 A
@ 20 Hour Rate 115 AH 5.75 A
@ 10 Hour Rate 105 AH 10.5 A
@ 5 Hour Rate 97 AH 19.3 A
Cut Off Voltage Constant Current Discharge
 VPC 1 hr 2 hr 3 hr 5 hr 8 hr 10 hr
62.1 33 27 18.2 11.9 10.5


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