OPTIMA Technical Specs YellowTop0 pages

OPTIMA® YellowTop Technical Specs DUAL PURPOSE (STARTING & DEEP CYCLE) BATTERIES MODELNUMBER YT S 5.5 YT 5.0 YT S 4.2 YT U 4.2 YT R 3.7 YT S 2.7 YT R 2.7 YT S 2.1 PERFORMANCE Voltage (V) 12 13,1 12 12 12 12 6 Cold Cranking Amps @ -18°C (A) 975 845 765 765 660 460 765 Cranking Amps @ 0°C (A) 1125 1025 870 870 810 575 870 Reserve Capacity (Minutes) 155 140 120 120 98 66 120 Capacity (C/20 Rate) (Ah) 75 66 55 55 48 38 55 Internal Resistance (ohms) 0,0025 0,0025 0,0028 0,0028 0,0032 0,0046 PHYSICAL SPECS Length (mm) 325 308,86 254 254 237 237 254 Width (mm) 165 171,75 175 175 172 129 90 Height (mm) 238 218,69 200 200 197 227 203 Mimimum Weight (kg) 26,5 24,1 19,5 19,9 16,6 11,6 9,5 Type Post/Terminal SAE SAE / BCI SAE SAE & GM SAE SAE & Jap SAE BCI Group 31 27F 34 34/78 35 51 & 51R 6 Volt Charging Info The following charging methods are recommended to insure a long battery life (Always use a voltage regulated charger, with voltage limits set as described below): All OPTIMA® YellowTop Batteries These batteries are dual purpose. They are designed for engine start and cyclic applications and for use in vehicles with large accessory loads. Recommended charging information: Alternator: 13.65 to 15.0 volts, no amperage limit. Battery charger: 13.8 to 15.0 volts, 10 amps maximum, 6-12 hours approximate. Cyclic Applications: 14.7 volts, no current limit as long as battery temperature remains below 50°C (125°f). When current falls below 1 amp, finish with 3 amp constant current for 1 hour for YT S 5,5.and 2 amp constant current for 1 hour for all other types.