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OPTIMA® Battery 34/78 REDTOP® Starting Battery - I&M Electric
  • SKU: OPT-8004-003

OPTIMA® Battery 34/78 REDTOP® Starting Battery

$309.97 $355.00


  • Strongest five-second starting burst
  • 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

OPTIMA® REDTOP® 34/78 Ultra high-performance SPIRALCELL TECHNOLOGY® AGM (absorbent glass mat) battery with reliable cranking power for your auto, car or truck and twice the life. The OPTIMA® REDTOP® will outperform and outlast traditional batteries in demanding cranking/starting applications. The ultimate high-CCA starting battery for vehicles that have alternators capable of keeping up with all electrical loads.
If you have demanding electrical accessory loads such as winches, audio systems, and other devices, take a look at the YELLOWTOP® product line.
The OPTIMA® model number for this battery is 34/78. If you are replacing an OPTIMA® battery you already have, this model is the same as batteries marked 8004-003, 9004-003, 27990, 34-78, 34/78-980, RED34/78, SC34U, or N9934/78RED.

*Pricing is based on exchange unit

Battery Model: 34/78
Part Number: 8004-003
NSN: 6140 01 457 4339
UPC Code: 8 11405 00003 4

Performance Data

Cold Cranking Amps: 800
Cranking Amps: 1000
Nominal Voltage: 12 volts
Open Circuit Voltage (fully charged): 12.8 volts
Internal Resistance (fully charged): 0.0030 ohms
Capacity: 50 Ah (C/20)
Reserve Capacity: BCI: 100 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®.


Sulfuric acid, H2SO4

Case: Polypropylene
Case Color: Dark Gray
Cover Color: “OPTIMA“ Red
Group Size: BC I: 34/78
Post Type: Dual SAE/GM
Weight: 38.8 lb
Length: 10.06 in
Width: 6.94 in
Height: 7.88 in


CCA (BCI 0°F): 800 amps
MCA (BCI 32°F): 1000 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: 34/78 These batteries are designed for engine starting applications.  They are not recommended or warranted for use in deep cycle applications.

Recommended Charging Information

Alternator: 13.3 to 15.0 volts; no amperage limit
Battery Charger: 13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approxima te
Float Charge: 13.2 to 13.8 volts; 1 amp max imum current (indefinite time a t lower voltages)
Rapid Recharge (Constant voltage charger): Max imum voltage 15.6 volts. No current limit as long as ba ttery tempera ture rema ins below 125°F (51.7°C ). C harge until current drops below 1 amp. All limits must be stric tly adhered to.