Optima D51, SC51DA, 8071-167, Battery Fits Honda Civic 83-90

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The YellowTop® high-performance AGM battery is one of the only true dual-purpose automotive batteries available. With premium cranking power and unparalleled cycling capability (rechargeability), it is perfect for modern accessory-loaded vehicles. The YellowTop can repeatedly bounce back from deep power drains to full energy capacity, so it can power plenty of electronics and still start you up time after time. Lower internal resistance also provides more consistent power output and faster recharges. Trucks with winches, vehicles with multiple electronics, cars with high-demand audio systems, commercial vehicles and heavy equipment all rely on this battery to provide ultimate starting and deep cycle power.  


Full factory warranty






  • Deep-cycle and cranking power
  • Up to two times longer life
  • More than 15 times the vibration resistance
  • Completely spillproof, mountable in virtually any position
  • Maintenance-free
  • Faster recharging
  • Optimal starting power
  • 300+ discharge/recharge cycles



Battery Model: D51
Part Number: 8071-167
NSN: 6140-01-523-6288
UPC Code: 8 11405 00007 2





Performance Data

Cold Cranking Amps: 450
Cranking Amps: 575
Nominal Voltage: 12 volts
Open Circuit Voltage (fully charged): 13.1 volts
Internal Resistance (fully charged): 0.0046 ohms
Capacity: 38 Ah (C/20)
Reserve Capacity: BCI: 66 minutes (25 amp discharge, 80°F (26.7°C ), to 10.5 volts cutoff)





Physical Characteristics

Plate Design:

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


Sulfuric acid, H2SO4

Case: Polypropylene
Case Color: Light Gray
Cover Color: “OPTIMA“ Yellow
Group Size: BCI: 51
Post Type: SAE Post
Weight: 26 lb
Length: 9.31 in
Width: 5.06 in
Height: 8.94 in






CCA (BCI 0°F): 450 amps
MCA (BCI 32°F): 575 amps





Recommended Charging

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: D51 and D51R
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;; 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