OPTIMA BlueTop BT DC-4.2 12V 55Ah 765A L+

Name: OPTIMA BlueTop BT DC-4.2 12V 55Ah 765A L+
Brand: OPTIMA Batteries
SKU: O816253000
Price: 434.60 EUR
Availability: OutOfStock

Marine and RV battery with extra threaded terminals for accessory and trolling-motor connections. Works as a starting or dual-purpose deep-cycle battery. Maintenance-free AGM SpiralCell.

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Reference: O816253000

EAN: 4016987113547

Frequently bought together

Marine and RV battery with extra threaded terminals for accessory and trolling-motor connections. Works as a starting or dual-purpose deep-cycle battery. Maintenance-free AGM SpiralCell.

Brand: OPTIMA
Series: BlueTop
Model: BT DC-4.2
Type: Dual purpose
Voltage: 12 V
Capacity: 55 Ah
Cold cranking (CCA): 765 A
Polarity: L+
Terminals: Standard terminal + threaded
Dimensions (L×W×H): 254 × 175 × 200 mm
Weight: 20.3 kg
Maintenance-free
Intended use: Marine and recreation

About this battery
OPTIMA BlueTop is the marine / RV version, adding threaded marine terminals alongside the standard posts. Depending on model it works as a starting battery (like RedTop) or a dual-purpose deep-cycle battery (like YellowTop) — suited to boats, trolling motors and campers. Its AGM SpiralCell construction makes it maintenance-free, spill-proof and vibration-resistant.

Key terms

CCA (Cold Cranking Amps) — cold-start power; higher means a stronger start in the cold
Ah — capacity / energy reserve
L+ / R+ — terminal polarity (which side the positive post is on); important for correct fitment