Extended battery warranty with charger purchase. Click here for more information.
OPTIMA® BLUETOP® D31M group 31 batteries are our most powerful and have the largest energy storage capacity. Usually they can be mounted anywhere a (slightly shorter) group 27 would be used. Ultra high-performance SPIRALCELL TECHNOLOGY® AGM (absorbent glass mat) dual-purpose battery for marine and RV. BLUETOP® has three times the cycling capability (rechargeability) with ultimate cranking power for your boat or RV in a maintenance-free package. Perfect for multiple high-demand accessories and trolling motors with 15 times the vibration resistance and lighter weight. Lower internal resistance provides more efficient power output and faster recharges.
The OPTIMA® model number for this battery is D31M. If you are replacing an OPTIMA® battery you already have, this model is the same as batteries marked 8052-161, 9052-161, 27931, D31M-1125, BLUED31M, 27551, SC31DM, or N99D31MBLUE.
User ManualView Warranty Sheet
||6140 01 502 4405
||8 11405 00161 1
|Cold Cranking Amps:
|Open Circuit Voltage (fully charged):
|Internal Resistance (fully charged):
||75 Ah (C/20)
||BCI: 155 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)
High purity lead-tin alloy. Wound cell configuration utilizing proprietary
Sulfuric acid, H2SO4
||Dual SAE & 5/16 Stainless Stud
|CCA (BCI 0°F):
|MCA (BCI 32°F):
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.)
These batteries are designed for starting and deep cycle applications and for use in vehicles with large accessory loads.
Recommended Charging Information
||13.65 to 15.0 volts
||13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximate
||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 3 amp constant current for 1 hour.
All limits must be strictly adhered to.
Shipping and Transportation Information
OPTIMA batteries can be shipped by AIR. The battery is nonspillable and is tested according to ICAO Technical Instructions DOC. 9284-AN/905 to meet the requirements of Packing Instructions No. 806 and is classified as non-regulated by IATA Special Provision A-48 and A-67 for UN2800.
Terminals must be protected from short circuit.