Optima
Optima RTS-2.1 · Classic car battery 6V 50Ah 815A
Reference: BOL-OPTIMA-RTS-2.1 · EAN 4016987113516
Optima RTS-2.1 (ETN 810 355 000, also written 810355000): classic car battery (spiral AGM) with 6 V, 50 Ah and 815 A cold cranking current, measuring 254 × 90 × 203 mm.
Optima RTS-2.1 · Classic car battery 6V 50Ah 815A images
- Voltage
- 6V
- Capacity
- 50Ah
- Cold cranking amps (EN)
- 815A
- Technology
- Spiral AGM
- Dimensions (L × W × H)
- 254 × 90 × 203 mm
Price:
€160.14
Tax included
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For Spain, Portugal, France, Germany, Italy, Belgium and the Netherlands you see the exact cost before paying. For the rest of Europe we send you a shipping quote, with no obligation.
14 days to return your order
If it does not fit, you have 14 days from delivery to return it unused.
Does it fit your vehicle? Check by number plate or VIN
Enter your number plate or chassis number (VIN): we check whether this battery is compatible with your vehicle.
The Optima RTS-2.1 at a glance
The Optima RTS-2.1 is a starter battery for classic and collector cars, with the format and terminals used by vehicles of its era.
At 50 Ah it covers petrol compacts and small diesels, the best-selling format in Europe. The RTS-2.1 belongs to the Optima OPTIMA RED TOP range. See all Optima batteries
Optima RTS-2.1 vs YTS-2.1: which one to choose?
What sets the RTS-2.1 apart from its neighbours in the Optima range:
| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Optima RTS-2.1 (this one) | 50 Ah | 815 A | 254 × 90 × 203 | 8.9 kg |
| Optima YTS-2.1 | 55 Ah | 765 A | 255 × 90 × 206 | 10.6 kg |
- Optima YTS-2.1: 5 Ah more, 50 A less cranking power, a different case (255 × 90 × 206 mm).
Part numbers and codes for the Optima RTS-2.1
Look for any of these RTS-2.1 codes on your current battery or in the manufacturer's catalogue:
| Commercial reference | RTS-2.1 |
|---|---|
| ETN code | 810355000 (also 810 355 000) |
| EAN | 4016987113516 |
| Base hold-down | B11 |
| Also known as | Optima 810355000 · Optima 810 355 000 |
| Not to be confused with | Optima YTS-2.1 (55 Ah, 765 A, positive terminal on the left) |
Equivalents and alternatives to the Optima RTS-2.1
We have no other battery with exactly the dimensions and polarity of the RTS-2.1. Browse the rest of our 6V batteries for classic cars to compare close options.
Check this before ordering the Optima RTS-2.1
- The RTS-2.1 needs 254 × 90 × 203 mm of space: measure it with the hold-down clamp in place.
- With 50 Ah, the RTS-2.1 replaces an original battery of that capacity or slightly less.
- Check the EN amps on your battery: if it says 815 A or less, the RTS-2.1 covers your engine.
Inside the RTS-2.1: spiral AGM technology
The RTS-2.1 is a spiral-cell AGM battery. Perfect for 4x4s, marine use and vehicles with lots of electronics.
Frequently asked questions about the Optima RTS-2.1
RTS-2.1 or YTS-2.1: which one suits me?
Compared with the RTS-2.1, the Optima YTS-2.1 has 5 Ah more and 50 A less cranking power. The RTS-2.1 cranks harder; the YTS-2.1 is only a good option if your original battery says 765 A or less. Mind the space: the YTS-2.1 measures 255 × 90 × 206 mm.
What is the ETN code of the Optima RTS-2.1?
810355000, also written 810 355 000. The ETN (European Type Number) is printed on the label and used in parts catalogues.
How much does the Optima RTS-2.1 weigh?
8.9 kg, with 50 Ah of capacity. For reference, the Optima YTS-2.1 (55 Ah) weighs 10.6 kg.
Which charger does the Optima RTS-2.1 need?
A charger with an AGM mode. If the battery has dropped below 10.5 V some chargers will not recognise it: use one with a recovery mode or one specific to spiral AGM.
Other options if you are unsure about the RTS-2.1
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