# Varta YT9B-BS · Motorcycle battery 12V 8Ah 115A

![Varta YT9B-BS · Motorcycle battery 12V 8Ah 115A](https://bateriasonline.es/1279-home_default/varta-yt9b-bs-508902012.jpg)

> Varta YT9B-BS (ETN 508902012): 8 Ah motorcycle battery, 115 A (EN), 149×70×105 mm, positive terminal on the left.

**Category:** [Motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) → [Varta](https://bateriasonline.es/en/varta-batteries)

- **Canonical URL**: https://bateriasonline.es/en/varta-yt9b-bs-508902012
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-508902012
- **EAN**: 4016987169087
- **MPN**: 508902012
- **Price**: 91,05 € (VAT incl., Spain)
- **Last updated**: 2026-11-09

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Varta |
| Range | VARTA PowerSports AGM |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 8 Ah |
| Cold cranking amps (EN) | 115 A |
| Length | 149 mm |
| Width | 70 mm |
| Height | 105 mm |
| Weight | 2.78 kg |
| Polarity | Positive terminal on the left |
| Terminal type | Y11 |
| ETN code | 508902012 |
| JIS code | YT9 B-4 YT9 B-BS |

## Quick description

The Varta YT9B-BS (ETN 508 902 012, also written 508902012) is a motorcycle battery (AGM) with 12 V, 8 Ah and 115 A cold cranking current, measuring 149 × 70 × 105 mm, with the positive terminal on the left.

## Description

## Where the Varta YT9B-BS fits

The Varta YT9B-BS is made for motorcycles, scooters and quads. With 8 Ah, the YT9B-BS suits motorcycles and scooters that had a battery of that capacity.
At 8 Ah it covers mid-capacity motorcycles, large scooters and light quads. In the Varta catalogue, the YT9B-BS belongs to the Powersports AGM line. [The full range of Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Varta YT9B-BS codes and part numbers

Shops, garages and catalogues identify the YT9B-BS with these codes:

| Commercial reference | YT9B-BS |
|---|---|
| ETN code | 508902012 (also 508 902 012) |
| Manufacturer short code | T9B-4/T9B-BS |
| EAN | 4016987169087 |
| Case size according to Varta | T9B-BS (T9B-4) |
| Base hold-down | B00 |
| Terminal type | Y11 |
| Also known as | Varta 508902012 · Varta 508 902 012 · Varta T9B-4 · Varta T9B-BS |
| Not to be confused with | Varta YT7B-BS (7 Ah, 120 A) |

## Equivalents and alternatives to the Varta YT9B-BS

As the YT9B-BS is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide AGM12-7.1 | AGM | 8 Ah | 110 A | 150 × 70 × 105 |
| Exide ET9B-BS | AGM | 8 Ah | 110 A | 150 × 70 × 105 |
| Motobatt MBT9B4 | AGM | 9 Ah | 115 A | 150 × 70 × 104 |
| Varta T9B (FA) | AGM | 8 Ah | 115 A | 150 × 70 × 105 |

## Varta YT9B-BS vs YTX9-BS, YT7B-BS and YTX9 (FA): differences

How the YT9B-BS compares with Varta batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta YT9B-BS (this one) | 8 Ah | 115 A | 149 × 70 × 105 | left | 2.78 kg |
| Varta YTX9-BS | 8 Ah | 135 A | 152 × 88 × 106 | left | 3.04 kg |
| Varta YT7B-BS | 7 Ah | 120 A | 150 × 66 × 94 | left | 2.35 kg |
| Varta YTX9 (FA) | 8 Ah | 135 A | 151 × 87 × 106 | left | 3 kg |

- Varta YTX9-BS: the same capacity, 20 A more cranking power, a different case (152 × 88 × 106 mm).
- Varta YT7B-BS: 1 Ah less, 5 A more cranking power, a different height (94 mm instead of 105 mm). It is the option if your battery tray cannot take the 105 mm height of the YT9B-BS.
- Varta YTX9 (FA): the same capacity, 20 A more cranking power, a different case (151 × 87 × 106 mm).

## Check this before ordering the Varta YT9B-BS

- The YT9B-BS needs 149 × 70 × 105 mm of space: measure it with the hold-down clamp in place.
- With the terminals facing you, the positive terminal of the YT9B-BS is on the left.
- Your current battery should say about 8 Ah; a little more is also fine.
- Cold cranking: 115 A (EN), equal to or higher than the original.

## Frequently asked questions about the Varta YT9B-BS

### Varta YT9B-BS or YTX9-BS?

Compared with the YT9B-BS, the Varta YTX9-BS has 20 A more cranking power. If your current battery says 135 A or more, choose the YTX9-BS; if it says 115 A or less, the YT9B-BS is enough. Mind the space: the YTX9-BS measures 152 × 88 × 106 mm.

### Varta YT9B-BS or YT7B-BS: what changes?

Mainly the height: the YT9B-BS is 105 mm tall and the Varta YT7B-BS 94 mm, with the same length and width. In capacity and cranking power, the YT7B-BS offers 7 Ah and 120 A against 8 Ah and 115 A. Before choosing between the YT9B-BS and the YT7B-BS, measure the free height of the battery compartment with the cover or bonnet closed.

### Is the Varta 508902012 the same battery as the Varta YT9B-BS?

Yes. 508902012 is the ETN code Varta uses for its YT9B-BS battery, so you can search for it by either code.

### How much does the Varta YT9B-BS weigh?

The YT9B-BS weighs 2.78 kg. For reference, the Varta YTX9-BS (8 Ah) weighs 3.04 kg.

### Which battery is equivalent to the Varta YT9B-BS?

Only other AGM batteries with its dimensions and polarity: Exide AGM12-7.1, Exide ET9B-BS and Motobatt MBT9B4. Neither an EFB nor a conventional battery replaces the YT9B-BS.

### Which side is the positive terminal on the Varta YT9B-BS?

The YT9B-BS has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

### Does the Varta YT9B-BS come charged and ready to fit?

Sealed AGM and gel batteries leave the factory charged and ready. Conventional ones with a separate acid pack are activated when filled and should be charged before fitting.

## AGM technology in the YT9B-BS

Inside, the YT9B-BS has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Keep comparing: alternatives to the YT9B-BS

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Varta catalogue](https://bateriasonline.es/en/varta-batteries)
- [Exide AGM12-7.1](https://bateriasonline.es/en/exide-agm12-7-1) · 8 Ah, 110 A, 150×70×105 mm
- [Exide ET9B-BS](https://bateriasonline.es/en/exide-et9b-bs) · 8 Ah, 110 A, 150×70×105 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-11*