8004-003 34/78

Length: 10.06" Height: 7.88" Width: 6.94" (Inch)

3 Year(s) Free Replacement



SKU: OPTIMA-DT Category:
Polarity Positive on left and negative on right
Brand Optima
Replacement year 3 YEAR
Capacity 50Ah (C/20)
CA 1000
BCI Group Size BCI 34/78
Reserve Capacity BCI: 100 minutes
Shipping Free Freight Canada Wide
Specification Sheet Click here
MCA 1000
Model 34/78
Part Number 8004-003
UPC Code 8 11405 00003 4
Open Circuit Voltage 12.8 Volts
Internal Resistance 0.0030 ohms
Nominal Voltage 12 Volts
CCA (Amps) 800



Brandon Battery provides high quality 8004-003 34/78 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.

8004-003 34/78 Red Top Optima 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.

8004-003 34/78 has the following features:

  • Battery Name : 8004-003 34/78
  • Battery Model: 34/78
  • Part Number: 8004-003
  • Nominal voltage : 12 Volt
  • Dimensions: 10.6 X 6.94 X 7.88 (inches
  • Capacity: 50 AH (C/20)
  • Weight: 38.8 lb
  • Group size : BCI: 34/78
  • Post Type: Dual SAE/GM
  • Cold Cranking Amps: 800
  • Cranking Amps : 1000 CA
  • Reverse capacity : BCI: 100 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)
  • Case: Polypropylene
  • Case Color: Dark Gray
  • Cover Color:  “OPTIMA“ Red

Why you should choose our 8004-003 34/78:

  • Both dual-purpose and starting applications are 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


There are no reviews yet.

Be the first to review “8004-003 34/78”

Your email address will not be published. Required fields are marked *

Pro tip

Does your vehicle sit for long periods of time?

Help your battery last longer