OPTIMA Technical Specs RedTop0 pages

OPTIMA® RedTop® Technical Specs STARTING BATTERIES MODELNUMBER RT S 4.2 RT R 4.2 RT F 4.2 RT U 4.2 RT U 3.7 RT S 3.7 RT R 3.7 RT S 2.1 PERFORMANCE Voltage (V) 12 12 12 12 12 6 Cold Cranking Amps @ -18°C (A) 815 815 815 730 730 800 Cranking Amps @ 0°C (A) 1000 1000 1000 910 910 1000 Reserve Capacity (Minutes) 100 100 100 90 90 100 Capacity (C/20 Rate)(Ah) 50 50 50 44 44 50 Internal Resistance (ohms) 0,003 0,003 0,003 0,003 0,003 0,0019 PHYSICAL SPECS Length (mm) 254 254 254 237 237 254 Width (mm) 172 185 172 172 172 83 Height (mm) 200 184 200 197 197 200 Mimimum Weight (kg) 17,2 17,5 17,6 15 14,4 8,4 Type Terminal SAE GM Dual SAE & GM Dual SAE & GM SAE SAE BCI Group 34 & 34R 78 34/78 75/35 25 & 35 - Charging Info All OPTIMA® RedTop Batteries These batteries are designed for engine starting applications. They are NOT recommended or warranted for use in deep cycle applications. Recommended charging information: Alternator: 13.3 to 15.0 volts, no amperage limit. Battery charger: 13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate. Rapid Recharge: Maximum voltage 15.6 volts (regulated). Maximum current: No limit as long as temperature < 50°C (1251F). Maximum recharge time: Charge until current drops below 1 amp. Float charge: 13.2 to 13.8 volts, 1 amp maximum current, time indefinite (at lower voltage). All limits must be strictly adhered to.