OPTIMA® YELLOWTOP® D31T Ultra high-performance SPIRALCELL TECHNOLOGY® AGM (absorbent glass mat) dual-purpose deep-cycle and starting battery. OPTIMA® YELLOWTOP® batteries have three times the cycling capability (rechargeability) with ultimate cranking power for your auto, car or truck to outperform traditional batteries. Perfect for powering heavy electrical loads, including winches, audio systems, inverters, and other demanding vehicle accessories and electronics. Lower internal resistance provides more efficient power output and faster recharges.
The OPTIMA® model number for this battery is D31T. If you are replacing an OPTIMA® battery you already have, this model is the same as batteries marked 8050-160, 9050-160, 27993, D31T-1125, YEL31T, SC31DS, or N9931TYEL.
|NSN:||6140 01 457 5469|
|UPC Code:||8 11405 00050 8|
|Cold Cranking Amps:||900|
|Nominal Voltage:||12 volts|
|Open Circuit Voltage (fully charged):||13.1 volts|
|Internal Resistance (fully charged):||0.0025 ohms|
|Capacity:||75 Ah (C/20)|
|Reserve Capacity:||BCI: 155 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)|
|Plate Design:||High purity lead-tin alloy. Wound cell configuration utilizing proprietary
|Electrolyte:||Sulfuric acid, H2SO4|
|Case Color:||Light Gray|
|Cover Color:||“OPTIMA“ Yellow|
|Group Size:||BCI: 31|
|Post Type:||3/8 Stainless Steel Stud|
|CCA (BCI 0°F):||900 amps|
|MCA (BCI 32°F):||1125 amps|
|The following charging methods are recommended to ensure a long battery life:
(Always use a voltage regulated charger with voltage limits set as described below.)Model: D31T
These batteries are designed for starting and deep cycling applications and for use in vehicles with large accessory loads..
Recommended Charging Information
|Alternator:||13.65 to 15.0 volts|
|Battery Charger:||13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate|
|Float Charge:||13.2 to 13.8 volts; 1 amp maximum (indefinite time at lower voltages)|
|Rapid Recharge (Constant voltage charger):||Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below 1 amp.|
|Cyclic or Series String Applications::||14.7 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 2 amp constant current for 1 hour.
All limits must be strictly adhered to.