The Ultimate Power Source ™

BLUETOP® D31M

SKU: 8052-161
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$314.99
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Key Benefits

  • Both dual-purpose and starting applications available
  • Up to 3x more recharges than other marine batteries
  • More than 15 times the vibration resistance
  • Spill-proof
  • Mountable in virtually any position
  • Maintenance-free
  • Optimal starting power (dual purpose and starting applications available)
  • Works well as a boat battery or RV battery

Battery Warranty

At OPTIMA® Batteries, we value your business and we're here to provide you the very best of service. Click the button below to view your BLUETOP battery warranty information.

DOWNLOAD WARRANTY

Extended battery warranty with charger purchase.

CLICK HERE FOR MORE INFORMATION

Specs

Model:
D31M
Weight:
59.8 lb
C20 Capacity:
75 Ah
Post Type:
Dual SAE & 5/16 Stainless Stud
CCA:
900 Amp
Width:
6.56 in
Length:
12.81 in
Height:
9.38 in
View Full Specs
Model:
D31M
Weight:
59.8 lb
C20 Capacity:
75 Ah
Post Type:
Dual SAE & 5/16 Stainless Stud
CCA:
900 Amp
Width:
6.56 in
Length:
12.81 in
Height:
9.38 in
Reserve Capacity:
BCI: 155
Voltage:
12 Volts
Case Material:
Polypropylene
Case Color:
Light Gray
Cover Color:
"OPTIMA" Blue
Group Size:
BCI: 31
Internal Resistance:
0.0025
NSN:
6140 01 502 4405
Plate Design:

High purity lead-tin alloy.  Wound cell configuration utilizing proprietary
SPIRALCELL TECHNOLOGY®.

Electrolyte:

Sulfuric acid, H2SO4

MCA:
1125 amps
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:
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.
Shipping Info:

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.

Recommended Charging Details:

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: D31M
These batteries are designed for starting and deep cycle applications and for use in vehicles with large accessory loads.

Cyclic or Series:

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.

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OPTIMA® Chargers

The OPTIMA Digital 400 and Digital 1200 12V Performance Battery Charger and Maintainers enhance the performance of OPTIMA and other high-performance AGM batteries in addition to flooded batteries. They also recover deeply discharged batteries and extend the life of all lead-acid batteries.