12VVolts
66AhAmp-hours at C20
765AStarting power (EN)
Summary: Here is the Optima BTDC-5.0 in one line: boats and motorhomes, 66Ah 12V 765A. Matching technology keeps the charging system happy.
Full specifications of the Optima BTDC-5.0
Practical advice for boats and motorhomes
A family week on a campsite without hook-up drains a leisure battery steadily. Check the mains charger setting each spring. Lights that dim long before bedtime point to lost capacity.
Is the Optima BTDC-5.0 right for you?
Your boat or motorhome runs on a Optima BTDC-5.0? This is its page. Rated 66Ah 12V 765A, it gives a solid base for planning a domestic bank. Comparing batteries online side by side helps balance capacity, weight and room in the locker.
A modest 66Ah keeps size and weight down for tight spaces. Cold starts are well covered: 765A is above the norm for its class.
Answers before you buy
How many cold cranking amps does this battery give?
It delivers 765A. Diesels usually need more than petrol engines, so check your handbook.
How do I compare size and polarity?
Measure your current battery and note its terminal position. This one is 309 × 172 × 221 mm, positive on the left-hand side.
Should I charge a stored battery before use?
It is a good idea. All batteries lose some charge on the shelf, so a top-up before fitting helps.
Will the Optima BTDC-5.0 fit?
- ✓ Mirror-image layouts exist; this one is positive on the left-hand side.
- ✓ With 66Ah of capacity, hold it up to the figure on the outgoing unit or in your equipment manual.
- ✓ Cold cranking 765A: compare with your handbook's requirement.
More options
You will find this battery in the boats and motorhomes section of baterias.online, ready to order. Other Optima models are linked below if you need a different size from the same maker.
spiral-cell AGM: how it works
Spiral batteries are sealed and do not need water. Spiral cells recharge quickly. Avoid deep discharges below the maker's limit.
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