# Varta YTX20L-BS · Motorcycle battery 12V 18Ah 250A

![Varta YTX20L-BS · Motorcycle battery 12V 18Ah 250A](https://bateriasonline.es/1305-home_default/varta-ytx20l-bs-518901025.jpg)

> Varta YTX20L-BS (ETN 518901025): 18 Ah motorcycle battery, 250 A (EN), 177×88×156 mm, positive terminal on the right.

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

- **Canonical URL**: https://bateriasonline.es/en/varta-ytx20l-bs-518901025
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-518901025
- **EAN**: 4016987169520
- **MPN**: 518901025
- **Price**: 52,34 € (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 | 18 Ah |
| Cold cranking amps (EN) | 250 A |
| Length | 177 mm |
| Width | 88 mm |
| Height | 156 mm |
| Weight | 5.96 kg |
| Polarity | Positive terminal on the right |
| Terminal type | Y4 |
| ETN code | 518901025 |
| JIS code | YTX20 L-4 YTX20 L-BS |

## Quick description

The Varta YTX20L-BS (ETN 518 901 025, also written 518901025) is a motorcycle battery (AGM) with 12 V, 18 Ah and 250 A cold cranking current, measuring 177 × 88 × 156 mm, with the positive terminal on the right. If yours has the positive terminal on the left, you need the Varta YTX20-BS.

## Description

## Who the Varta YTX20L-BS is for

The Varta YTX20L-BS is made for motorcycles, scooters and quads. It is worth keeping the YTX20L-BS on a maintenance charger if the bike is laid up over winter.
At 18 Ah it goes into large-capacity motorcycles, adventure bikes, customs and quads. In the Varta catalogue, the YTX20L-BS belongs to the Powersports AGM line. [More Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Part numbers and codes for the Varta YTX20L-BS

This is how the Varta YTX20L-BS appears on the label and in parts catalogues:

| Commercial reference | YTX20L-BS |
|---|---|
| ETN code | 518901025 (also 518 901 025) |
| Manufacturer short code | TX20L-4/TX20L-BS |
| EAN | 4016987169520 |
| Case size according to Varta | TX20L-BS (TX20L-4) |
| Base hold-down | B00 |
| Terminal type | Y4 |
| Also known as | Varta 518901025 · Varta 518 901 025 · Varta TX20L-4 · Varta TX20L-BS |
| Not to be confused with | Varta YTX20-BS (18 Ah, 250 A, positive terminal on the left), Varta YTX20H-BS (18 Ah, 320 A), Varta YTX20HL-BS (18 Ah, 320 A) |

## Equivalents and alternatives to the Varta YTX20L-BS

Other AGM batteries that fit the YTX20L-BS's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide AGM12-19 | AGM | 18 Ah | 270 A | 175 × 90 × 155 |
| Exide ETX20HL-BS | AGM | 18 Ah | 270 A | 175 × 90 × 155 |
| Fulbat FTX20L-BS | AGM | 18.9 Ah | 270 A | 175 × 87 × 155 |
| Varta YTX20L-4 (FA) | AGM | 18 Ah | 270 A | 175 × 87 × 154 |

## Varta YTX20L-BS vs TX20HL (FA), YTX20-BS and YTX20H-BS: which one to choose?

Torn between the YTX20L-BS and another similar Varta? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta YTX20L-BS (this one) | 18 Ah | 250 A | 177 × 88 × 156 | right | 5.96 kg |
| Varta TX20HL (FA) | 18 Ah | 310 A | 176 × 89 × 154 | right | 6.55 kg |
| Varta YTX20-BS | 18 Ah | 250 A | 177 × 88 × 156 | left | 5.96 kg |
| Varta YTX20H-BS | 18 Ah | 320 A | 175 × 87 × 154 | right | 6.31 kg |

- Varta TX20HL (FA): the same capacity, 60 A more cranking power, the same dimensions.
- The Varta YTX20-BS is the same battery with the positive terminal on the other side: choose it if your current battery has the positive terminal on the left.
- Varta YTX20H-BS: the same capacity, 70 A more cranking power, the same dimensions.

## Check this before ordering the Varta YTX20L-BS

- Check the EN amps on your battery: if it says 250 A or less, the YTX20L-BS covers your engine.
- Capacity of the YTX20L-BS: 18 Ah; the same as your current battery or slightly more is fine.
- With the terminals facing you, the positive terminal of the YTX20L-BS is on the right.
- Measure the space: the YTX20L-BS takes up 177 × 88 × 156 mm.

## Frequently asked questions about the Varta YTX20L-BS

### YTX20L-BS or TX20HL (FA): which one suits me?

Compared with the YTX20L-BS, the Varta TX20HL (FA) has 60 A more cranking power. If your current battery says 310 A or more, choose the TX20HL (FA); if it says 250 A or less, the YTX20L-BS is enough. Both measure 177 × 88 × 156 mm, so they fit the same tray.

### Varta YTX20L-BS or YTX20-BS: what is the difference?

Only the polarity: the YTX20L-BS has the positive terminal on the right and the YTX20-BS the positive terminal on the left. Capacity (18 Ah), cranking power and dimensions are identical. That is why their ETNs only differ in the middle group: 518 901 025 for the YTX20L-BS and 518 902 025 for the YTX20-BS.

### Is the Varta 518901025 the same battery as the Varta YTX20L-BS?

Yes. 518901025 is the ETN code Varta uses for its YTX20L-BS battery, so you can search for it by either code.

### How much does the Varta YTX20L-BS weigh?

5.96 kg, with 18 Ah of capacity. For reference, the Varta TX20HL (FA) (18 Ah) weighs 6.55 kg.

### Which battery is equivalent to the Varta YTX20L-BS?

Only other AGM batteries with its dimensions and polarity: Exide AGM12-19, Exide ETX20HL-BS and Fulbat FTX20L-BS. Neither an EFB nor a conventional battery replaces the YTX20L-BS.

### How do I stop the motorcycle battery going flat in winter?

Connect it to a maintenance charger or disconnect it if the bike will sit for more than a month. A flat motorcycle battery sulphates in a few weeks.

## Inside the YTX20L-BS: AGM technology

Inside, the YTX20L-BS has glass fibre separators (AGM) that hold the electrolyte. The YTX20L-BS needs a charger with an AGM mode that does not exceed 14.7 V.

## More batteries to compare with the YTX20L-BS

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Varta catalogue](https://bateriasonline.es/en/varta-batteries)
- [Varta YTX24HL-BS](https://bateriasonline.es/en/varta-ytx24hl-bs-521908034) · 21 Ah, 340 A, 205×90×164 mm

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