CCA 450
Capacity 38Ah(C/20)
CA 575
BCI Group Size BCI 51
Reserve Capacity BCI: 66 minutes (25 amp discharge, 80 degree F(26.7 degree C), to 10.5 volts cut-off)
MCA 575
Bullet Points

” 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

Specifications Details Optima YellowTop D51 Ultra high performance SprialCell 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 D51. If you are replacing an Optima battery you already have, this model is the same as batteries marked 8071-167, 9071-167, 27951, YEL51, SC51DA or N99D51YEL.
Model D51
Part Number 8071-167
NSN 6.14E+12
UPC Code 8.11E+11
Open Circuit Voltage 13.1 Volts
Internal Resistance 0.0046 ohms
Plate Design High purity lead-tin alloy. Wound cell configuration utilizing proprietary SpiralCell Technology.
Electrolyte Sulfuric acid, H2SO4
Case Polypropylene
Case Color Light Gray
Cover Color Optima Yellow
Post Type SAE Post
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.
Alternator 13.65 to 15.0 Volts
Battery Charger 13.8 to 15.0 Volts, 10 amps maximum, 6-12 hours approximate
Float Charger 13.2 to 13.8 Volts, 1 amp maximum current (indefinite time at lower voltages)
Rapid Recharge Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 125 degree F (51.7 degree 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 degree F(51.7 degree C). When current falls below 1amp, finish with 2amp constant current for 1 hour. All limits must be strictly adhered to.
Nominal Voltage 12 Volts
CCA (Amps) 450
Overview The YELLOWTOP® high-performance AGM battery has everything you need. It’s the only true dual-purpose automotive battery available. With premium cranking power and unparalleled cycling capability, it’s perfect for modern, accessory-loaded vehicles. The YELLOWTOP® can repeatedly be brought back from deep power drains to full charge, 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 high-demand electronics and audio systems, commercial vehicles and heavy equipment can all rely on this battery to provide ultimate starting and deep-cycle power.



Sask Battery provides high quality 8071-167 D51 optima battery with best price and great value. Our battery comes already charged, sealed, maintenance free, and ready to install. We insures that almost 100% of the old battery can be rechargeable, recycled and protect the environment.

8071-167 D51 YellowTop is designed as a dual purpose battery, both starting and deep cycle for people who need a sure-starting, strong cranking, and maintenance free power source for their boat or RV, even in harsh conditions.

The unique SpiralCell design provides a strong and clean power source, ensuring the safety of you, your family and the environment. The higher reserve capacity gives you a longer shelf-life to give you the power when you need it, where you need it. This battery is designed to be used with recreational vehicles or boats with large accessory loads.

Our customer service staff will help you find the best kind of optima batteries for your need. Please call us or email us if you have any further consideration.

8071-167 D51 has the following features:

  • Battery Name : 8071-167 D51
  • Battery Model: D51
  • Part Number: 8071-167
  • Nominal voltage : 12 Volt
  • Dimensions: 9.272 X 5.024 X 8.885 (inches)
  • Capacity: 38 AH (C/20)
  • Weight: 26 lb
  • Group size : BCI: 31
  • Cold Cranking Amps: 450 CCA
  • Cranking Amps : 575 CA
  • Reverse capacity : BCI: 66 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)
  • Case: Polypropylene
  • Case Color: Light Gray
  • Cover Color:  “OPTIMA“ Yellow

Why you shoud choose our 8071-167 D51 :

  • 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


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8071-167 D51

LENGTH: 9.31" HEIGHT: 8.94" WIDTH: 5.06"







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