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OPTIMA BlueTop BT DC-4.2 12V 55Ah 765A L+
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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O816253000
4016987113547
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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
- Napiši osvrt
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