Optima battery Yellow Top series 8051-160 D31A

Battery Model:	D31A
Part Number:	8051-160
NSN:	6140 01 502 4973
UPC Code:	8 11405 00051 5

Performance Data
Cold Cranking Amps:	900
Cranking Amps:	1125
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)

Physical Characteristics
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:	â€œOPTIMAâ€œ Yellow
Group Size:	BCI: 31
Post Type:	SAE Post
Weight:	59.8 lb
Length:	12.19 in
Width:	6.56 in
Height:	9.38 in

Power
CCA (BCI 0°F):	900 amps
MCA (BCI 32°F):	1125 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: D31A 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.

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Optima battery Yellow Top series 8051-160 D31A
Battery Model: D31A Part Number: 8051-160 NSN: 6140 01 502 4973 UPC Code: 8 11405 00051 5

Optima battery Blue Top series 8052-161 - D31M
Battery Model: D31M Part Number: 8052-161 NSN: 6140 01 502 4405 UPC Code: 8 11405 00161 1 Performance Data

Optima battery Yellow Top series 8051-160 D31A

Performance Data

Physical Characteristics

Power

Recommended Charging

Recommended Charging Information