Summary: What you are looking at: the Optima BTDC-5.5, a 75Ah 12V 975A battery for boats and motorhomes. Weight is 27.9 kg, worth knowing before you lift it out of the tray.
12VVolts
75AhAmp-hours at C20
975AStarting power (EN)
Why choose the Optima BTDC-5.5
Your boat or motorhome runs on a Optima BTDC-5.5? This is its page. Rated 75Ah 12V 975A, it gives a solid base for planning a domestic bank. Plenty of owners now order batteries online during winter maintenance.
75Ah puts it squarely in the middle of the range for boats and motorhomes. A cranking figure of 975A is high for a case this size.
Full specifications of the Optima BTDC-5.5
ManufacturerOptima
Part numberBTDC-5.5
SeriesOPTIMA BLUE TOP
Suitsboats and motorhomes
Volts12V
Amp-hours at C2075Ah
Starting power (EN)975A
ChemistrySpiral-cell AGM
Dimensions (L × W × H)325 × 165 × 238 mm
Weight27.9 kg
Layout code8
Terminal type1 & 21
EAN4016987113592
Optima BTDC-5.5 in everyday use
Rough passages give boat batteries a beating that a car battery never sees. Strap the battery down as firmly as you would the engine. Leaving a caravan battery flat all winter often ruins it.
What spiral-cell AGM means for you
Six cylinders packed together give the familiar six-pack shape. Spiral cells recharge quickly. Choose the right type for starting or deep cycling.
Check before ordering
- ✓ Terminal check: 1 & 21. Spade widths and post diameters vary, so match the type exactly.
- ✓ Chemistry: spiral-cell AGM. Some vehicles and chargers are programmed for a specific type, so check before swapping.
- ✓ Dimensions to compare: 325 × 165 × 238 mm. Do not forget the base ledge, which the hold-down clamp grips on many vehicles.
Questions and answers
Should I charge a stored battery before use?
Store it fully charged, away from heat and frost, and give it a refresh charge before installation.
Will the Optima BTDC-5.5 fit my battery space?
Length, width and height are 325 × 165 × 238 mm, and the weight is 27.9 kg. Compare with the space available, including clearance above the posts.
What do 75Ah and 975A mean for this battery?
75Ah indicates how much charge it stores, 975A how much current it can deliver in a cold start. Both should be at least equal to the original.
What voltage and amp-hours does this model have?
It is a 12V battery with a capacity of 75Ah. In banks of several units, connect only identical batteries bought at the same time.
Related products and ranges
A photo of the old label plus this page is all it takes to order with confidence at baterias.online. Checking the data first saves the hassle of a wrong order.
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