# Optima YTR-5.0 · Motorhome battery 12V 66Ah 845A

![Optima YTR-5.0 · Motorhome battery 12V 66Ah 845A](https://bateriasonline.es/3901-home_default/optima-ytr-5-0.jpg)

> Optima YTR-5.0 (ETN 837327000): 66 Ah motorhome battery, 845 A (EN), 309×172×219 mm, positive terminal on the right, spiral AGM.

**Category:** [Leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan) → [Optima](https://bateriasonline.es/en/optima-batteries)

- **Canonical URL**: https://bateriasonline.es/en/optima-ytr-5-0
- **Language**: en
- **Brand**: Optima
- **Reference**: BOL-OPTIMA-YTR-5.0
- **EAN**: 4016987141038
- **MPN**: YTR-5.0
- **Price**: 256,47 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Optima |
| Range | OPTIMA YELLOW TOP |
| Application | Motorhomes and caravans |
| Technology | Spiral AGM |
| Voltage | 12 V |
| Capacity | 66 Ah |
| Cold cranking amps (EN) | 845 A |
| Length | 309 mm |
| Width | 172 mm |
| Height | 219 mm |
| Weight | 20.6 kg |
| Polarity | Positive terminal on the right |
| ETN code | 837327000 |

## Quick description

The Optima YTR-5.0 (ETN 837 327 000, also written 837327000) is a motorhome battery with 12 V, 66 Ah and 845 A cold cranking current, measuring 309 × 172 × 219 mm, with the positive terminal on the right.

## Description

## Where the Optima YTR-5.0 fits

The Optima YTR-5.0 is a leisure battery for motorhomes and caravans: it powers fridge, lights, water pump and heating for days without starting the engine. The YTR-5.0 powers the living area, separate from the vehicle's starter battery.
The YTR-5.0 belongs to the Optima OPTIMA YELLOW TOP range. [The full range of Optima batteries](https://bateriasonline.es/en/optima-batteries)

## Equivalents and alternatives to the Optima YTR-5.0

We have no other battery with exactly the dimensions and polarity of the YTR-5.0. Browse the rest of our [leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan) to compare close options.

## Optima YTR-5.0 vs YTS-5.5 and YTR-3.7: differences

Torn between the YTR-5.0 and another similar Optima? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Optima YTR-5.0 (this one) | 66 Ah | 845 A | 309 × 172 × 219 | right | 20.6 kg |
| Optima YTS-5.5 | 75 Ah | 975 A | 325 × 165 × 238 | – | 27.9 kg |
| Optima YTR-3.7 | 48 Ah | 660 A | 237 × 172 × 197 | right | 17.6 kg |

- Optima YTS-5.5: 9 Ah more, 130 A more cranking power, a different case (325 × 165 × 238 mm).
- Optima YTR-3.7: 18 Ah less, 185 A less cranking power, a different case (237 × 172 × 197 mm).

## What it means that the YTR-5.0 is spiral AGM

The YTR-5.0 is a spiral-cell AGM battery. Perfect for 4x4s, marine use and vehicles with lots of electronics.

## What to look at before buying the YTR-5.0

- The YTR-5.0 needs 309 × 172 × 219 mm of space: measure it with the hold-down clamp in place.
- Polarity of the YTR-5.0: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- With 66 Ah, the YTR-5.0 replaces an original battery of that capacity or slightly less.
- The YTR-5.0 delivers 845 A cold cranking (EN standard); do not go below what your original battery states.

## Part numbers and codes for the Optima YTR-5.0

Look for any of these YTR-5.0 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | YTR-5.0 |
|---|---|
| ETN code | 837327000 (also 837 327 000) |
| EAN | 4016987141038 |
| Case size according to Optima | D27F (BCI) |
| Base hold-down | B00 |
| Also known as | Optima 837327000 · Optima 837 327 000 · D27F |

## Frequently asked questions about the Optima YTR-5.0

### YTR-5.0 or YTS-5.5: which one suits me?

Compared with the YTR-5.0, the Optima YTS-5.5 has 9 Ah more and 130 A more cranking power. If your current battery says 975 A or more, choose the YTS-5.5; if it says 845 A or less, the YTR-5.0 is enough. Mind the space: the YTS-5.5 measures 325 × 165 × 238 mm.

### What is the ETN code of the Optima YTR-5.0?

837327000, also written 837 327 000. The ETN (European Type Number) is printed on the label and used in parts catalogues.

### How much does the Optima YTR-5.0 weigh?

20.6 kg, with 66 Ah of capacity. For reference, the Optima YTS-5.5 (75 Ah) weighs 27.9 kg.

### Which side is the positive terminal on the Optima YTR-5.0?

On the YTR-5.0, the positive terminal is on the right with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### How many days of autonomy does the Optima YTR-5.0 give in a motorhome?

It depends on consumption. With 66 Ah and LED lights, pump and a gas fridge, 2 or 3 days without recharging is normal; with an electric fridge, much less.

## Other options if you are unsure about the YTR-5.0

- [More leisure batteries for motorhomes and caravans](https://bateriasonline.es/en/leisure-batteries-motorhome-caravan)
- [The whole Optima range](https://bateriasonline.es/en/optima-batteries)

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