Which Optima for my 4x4 with winch?

Yellow Top D-31T (75Ah 975A) or D-31A depending on tray. The Yellow handles winch-induced deep cycling without premature ageing.

Does Optima work for a normal car?

Yes, a Red Top R-3.7 fits the standard tray and delivers maximum CCA. But if your car is just Start-Stop with no special demands, a conventional flat AGM covers it for less money.

Can I mount it upside down?

Yes, Optima SpiralCell is the only AGM family rated for any mounting angle, including fully inverted. Useful in hot rods and special installs.

How long does an Optima last?

8-10 years in normal use with seasonal float charge. Optima publishes 24-36-month limited warranty depending on line, but real-world life with proper maintenance is much longer.

Is Optima Yellow Top good for car audio?

It's exactly what competition audio asks for: repeated deep discharge without damage and fast charge acceptance from the alternator between tracks. The Yellow Top D-4.2 is the most popular SPL/SQ choice.

How long does shipping take?

Standard delivery 1 to 5 working days to your country. We process orders within 24h.

Optima batteries | Red Yellow Blue Top AGM SpiralCell

12,161 customer reviewsThank you for trusting usThank you! Excellent 4.5 out of 5

Optima is the AGM SpiralCell battery: spiral-wound pure-lead cells, up to 15 times more vibration-resistant than a conventional battery and with twice the service life. Red for starting, yellow for dual purpose and blue for marine. The colour tells you what it is for.

Optima ranges

Optima Red Top

Pure starting: cars, 4x4 and classics with demanding starts. Red.

RTC-4.250 Ah · 815 A · €185.80
RTU-3.744 Ah · 730 A · €187.30
RTS-3.744 Ah · 730 A · €190.80
RTS-4.250 Ah · 815 A · €187.40

See the range

Optima Yellow Top

Dual purpose: starting and deep cycle. Winch, audio, accessories, motorhome. Yellow.

YTS-5.575 Ah · 975 A · €261.10
YTS-4.255 Ah · 765 A · €213.80
YTS-2.738 Ah · 460 A · €154.90
YTR-2.738 Ah · 460 A · €214.50

See the range

Optima Blue Top

Marine: starting and service on board, vibration-proof and mountable in any position. Blue.

BTDC-5.575 Ah · 975 A · €263.70
BTDC-4.255 Ah · 765 A · €216.90
BTSLI-4.250 Ah · 815 A · €181.50
BTDC-5.066 Ah · 845 A · €225.70

See the range

All Optima ranges

The three lines

Best-selling Optima batteries

There are 23 products.

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On sale!

OPTIMA

Caravan battery Optima YTS-5.5 12V 75Ah 975A AGM

12V

75Ah

975A

325 × 165 × 238 mm

5,00(1)

€261.10 VAT incl.

Buy

On sale!

OPTIMA

Car battery Optima RTC-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

5,00(3)

€185.80 VAT incl.

Buy

OPTIMA

Marine battery Optima BTDC-5.5 12V 75Ah 975A AGM

12V

75Ah

975A

325 × 165 × 238 mm

5,00(1)

€263.70 VAT incl.

Buy

OPTIMA

Car battery Optima RTS-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

€187.40 VAT incl.

Buy

OPTIMA

Marine battery Optima BTDC-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€216.90 VAT incl.

Buy

OPTIMA

Caravan battery Optima YTS-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€213.80 VAT incl.

Buy

OPTIMA

Car battery Optima RTS-2.1 6V 50Ah 815A AGM

50Ah

815A

254 × 90 × 203 mm

5,00(4)

€163.60 VAT incl.

Buy

OPTIMA

Caravan battery Optima YTU-4.2 12V 55Ah 765A AGM

12V

55Ah

765A

254 × 175 × 200 mm

€210.80 VAT incl.

Buy

OPTIMA

Car battery Optima RTU-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

5,00(1)

€185.80 VAT incl.

Buy

OPTIMA

Car battery Optima RTU-3.7 12V 44Ah 730A AGM

12V

44Ah

730A

237 × 172 × 197 mm

€187.30 VAT incl.

Buy

OPTIMA

Auxiliary battery Optima YTR-2.7 12V 38Ah 460A AGM

12V

38Ah

460A

237 × 129 × 227 mm

2,00(1)

€214.50 VAT incl.

Buy

OPTIMA

Marine battery Optima BTSLI-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

5,00(1)

€181.50 VAT incl.

Buy

OPTIMA

Car battery Optima RTR-3.7 12V 44Ah 730A AGM

12V

44Ah

730A

237 × 172 × 197 mm

€191.90 VAT incl.

Buy

OPTIMA

Car battery Optima YTS-2.1 6V 55Ah 765A AGM

55Ah

765A

255 × 90 × 206 mm

€161.40 VAT incl.

Buy

OPTIMA

Marine battery Optima BTDC-5.0 12V 66Ah 765A AGM

12V

66Ah

845A

309 × 172 × 221 mm

€225.70 VAT incl.

Buy

OPTIMA

Car battery Optima RTR-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 175 × 200 mm

€209.90 VAT incl.

Buy

OPTIMA

Car battery Optima RTF-4.2 12V 50Ah 815A AGM

12V

50Ah

815A

254 × 185 × 184 mm

5,00(1)

€204.95 VAT incl.

Buy

OPTIMA

Caravan battery Optima YTR-5.0 12V 66Ah 845A AGM

12V

845

309 × 172 × 219 mm

€261.70 VAT incl.

Buy

Showing 1-18 of 23 item(s)

Optima SpiralCell: what makes it different

Optima Batteries (Clarios group, technical sister to VARTA) builds an AGM with spiral-wound cells instead of flat plates. Each cell is a tight cylinder of two 99.99% pure lead foils with a high-pressure-wound AGM separator. The result: up to 15x more vibration resistance than a flat battery, hundreds of cycles down to 80% depth of discharge without damage and the ability to mount at any angle — including fully inverted.

This makes them the logical choice for extreme-use profiles: 4x4 with electric winch, off-road with constant vibration, cars with competition audio (1,000+ W), hot rods with tight underbonnet space, restomodded classics, small-to-mid-size boats with house loads, low-capacity solar banks.

The three Optima lines

Line	Colour	Function	Capacity	Typical CCA	Top models
Red Top	Red	Pure starting — maximum CCA	38-50 Ah	720-815 A	RT R-3.7, RT S-4.2, RT 75/35
Yellow Top	Yellow	Dual: starting + deep cycle	38-75 Ah	660-975 A	YT S-4.2, YT D-4.2, YT D-31T
Blue Top	Blue	Marine — SAE + threaded dual post	50-75 Ah	815-975 A	BT D-31M, BT D-34M

When to pick each Optima

Optima Red Top — pure starting at maximum CCA. Best for cars/trucks without high parked loads but a demanding engine. Hot rod, big diesel, track day.
Optima Yellow Top — dual purpose, starting + deep cycle. Preferred for 4x4 with winch, competition audio, modified cars with many accessories, small motorhome.
Optima Blue Top — marine version with dual post (SAE for cranking, threaded for house loads). Boat, jet-ski.

Best-selling Optima models

Optima YT S-4.2 — Yellow Top 55Ah 765A. The most universal Yellow, fits standard European tray.
Optima YT D-4.2 — Yellow Top dual 55Ah 765A with side terminal. Competition audio, modified.
Optima YT D-31T — Yellow Top 75Ah 975A. Big 4x4 with winch, small motorhome.
Optima RT R-3.7 — Red Top 44Ah 720A. Pure cranking, hot rod, restored sports car.
Optima RT S-4.2 — Red Top 50Ah 815A. Demanding cranking, standard SAE post.
Optima BT D-31M — Blue Top marine 75Ah 900A dual post. Boat and jet-ski.

Optima vs conventional AGM

A high-end flat AGM (Varta Silver Dynamic AGM, Tudor AGM Microhybrid) covers 95% of standard Start-Stop cars and is the right choice if your vehicle has no special demands. Optima shines when there is extreme vibration, recurring deep cycling or need for non-standard mounting — no flat AGM matches SpiralCell there. The trade-off is price: an Optima costs 2-3x what an equivalent flat AGM does.

Frequently asked questions

Which Optima for my 4x4 with winch?: Yellow Top D-31T (75Ah 975A) or D-31A depending on tray. The Yellow handles winch-induced deep cycling without premature ageing.
Does Optima work for a normal car?: Yes, a Red Top R-3.7 fits the standard tray and delivers maximum CCA. But if your car is just Start-Stop with no special demands, a conventional flat AGM covers it for less money.
Can I mount it upside down?: Yes, Optima SpiralCell is the only AGM family rated for any mounting angle, including fully inverted. Useful in hot rods and special installs.
How long does an Optima last?: 8-10 years in normal use with seasonal float charge. Optima publishes 24-36-month limited warranty depending on line, but real-world life with proper maintenance is much longer.
Is Optima Yellow Top good for car audio?: It's exactly what competition audio asks for: repeated deep discharge without damage and fast charge acceptance from the alternator between tracks. The Yellow Top D-4.2 is the most popular SPL/SQ choice.
How long does shipping take?: Standard delivery 1 to 5 working days to your country. We process orders within 24h.

Optima catalogue curated by our technical team. 12,161 Trustpilot reviews · 4.5/5. 24-48 h delivery in mainland Spain and Portugal (orders before 6:00 pm); 14-day returns with free collection on the Iberian mainland.

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Optima batteries: Red Top, Yellow Top and Blue Top (AGM SpiralCell)

Optima ranges

Optima Red Top

Optima Yellow Top

Optima Blue Top

All Optima ranges

The three lines

Best-selling Optima batteries

Optima SpiralCell: what makes it different

The three Optima lines

When to pick each Optima

Best-selling Optima models

Optima vs conventional AGM

Frequently asked questions