Optima Blue Top BT-SLI4.2

Part Number: BT-SLI4.2
Volatage: 12V
Capacity Ah (C20): 50
CCA (EN): 815
Dimensions (mm) L x W x H: 255 x 175 x 200
Layout / Terminal: 1/1 Stud
Weight (Kg): 17.4


Optima Blue Top BT-SLI4.2
12V 50Ah 815 CCA (EN) Engine Start Battery

Inside the Optima Blue Top BT-SLI4.2 battery is a six-pack of SPIRALCELL TECHNOLOGY. Traditional batteries have a stack of thick lead plates surrounded by acid. But OPTIMA batteries feature two thin lead plates wound into a tight spiral cell, with an absorbent glass-mat in between to hold the electrolyte solution. This unique design allows for more power and increased energy, resulting in quick, reliable starts. OPTIMA batteries are the first and only batteries to feature SPIRALCELL TECHNOLOGY.


  • Available as both a starter and a deep cycle battery
  • More power in the initial 1,2,5 and 10 seconds of the starting process than similarly rated lead acid batteries
  • Optimal starting power, regardless of temperature
  • Ideal for seasonal use, fully charged, it can sit unused for up to 12 months at room temperature (or below) and still provide the power necessary to start your boats engine
  • Non spillable with complete fitment flexibility; can mount in almost any position


Download PDF Datasheet

Additional information

Weight 17.4 kg
Dimensions 25.5 × 17.5 × 20 cm