# Varta YT4L-BS · Motorcycle battery 12V 3Ah 40A

![Varta YT4L-BS · Motorcycle battery 12V 3Ah 40A](https://bateriasonline.es/1006-home_default/varta-yt4l-bs-503014004.jpg)

> Varta YT4L-BS (ETN 503014004): 3 Ah motorcycle battery, 40 A (EN), 114×71×86 mm, positive terminal on the right, AGM.

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

- **Canonical URL**: https://bateriasonline.es/en/varta-yt4l-bs-503014004
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-503014004
- **EAN**: 4016987168882
- **MPN**: 503014004
- **Price**: 20,58 € (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 | 3 Ah |
| Cold cranking amps (EN) | 40 A |
| Length | 114 mm |
| Width | 71 mm |
| Height | 86 mm |
| Weight | 1.39 kg |
| Polarity | Positive terminal on the right |
| Terminal type | Y5 |
| ETN code | 503014004 |
| JIS code | YT4 L-4 YT4 L-BS |

## Quick description

The Varta YT4L-BS (ETN 503 014 004, also written 503014004) is a motorcycle battery (AGM) with 12 V, 3 Ah and 40 A cold cranking current, measuring 114 × 71 × 86 mm, with the positive terminal on the right.

## Description

## Who the Varta YT4L-BS is for

The Varta YT4L-BS is made for motorcycles, scooters and quads. With 3 Ah, the YT4L-BS suits motorcycles and scooters that had a battery of that capacity.
At 3 Ah it is a small battery, typical of 50 to 125 cc scooters and light motorcycles. In the Varta catalogue, the YT4L-BS belongs to the Powersports AGM line. [More Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Part numbers and codes for the Varta YT4L-BS

Shops, garages and catalogues identify the YT4L-BS with these codes:

| Commercial reference | YT4L-BS |
|---|---|
| ETN code | 503014004 (also 503 014 004) |
| Manufacturer short code | T4L-4/T4L-BS |
| EAN | 4016987168882 |
| Case size according to Varta | T4L-BS (T4L-4) |
| Base hold-down | B00 |
| Terminal type | Y5 |
| Also known as | Varta 503014004 · Varta 503 014 004 · Varta T4L-4 · Varta T4L-BS |

## Equivalents and alternatives to the Varta YT4L-BS

We have no other battery with exactly the dimensions and polarity of the YT4L-BS. Browse the rest of our [motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries) to compare close options.

## Varta YT4L-BS vs YTX4L-4 (FA) and YTR4A-BS: differences

Torn between the YT4L-BS and another similar Varta? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta YT4L-BS (this one) | 3 Ah | 40 A | 114 × 71 × 86 | right | 1.39 kg |
| Varta YTX4L-4 (FA) | 3 Ah | 50 A | 113 × 70 × 87 | right | 1.4 kg |
| Varta YTR4A-BS | 2.3 Ah | 30 A | 114 × 49 × 86 | right | 0.99 kg |

- Varta YTX4L-4 (FA): the same capacity, 10 A more cranking power, the same dimensions.
- Varta YTR4A-BS: 0.70 Ah less, 10 A less cranking power, a different case (114 × 49 × 86 mm).

## Before ordering the YT4L-BS, check this

- The YT4L-BS delivers 40 A cold cranking (EN standard); do not go below what your original battery states.
- Your current battery should say about 3 Ah; a little more is also fine.
- The YT4L-BS has the positive terminal on the right: compare it with your current battery.
- Measure the space: the YT4L-BS takes up 114 × 71 × 86 mm.

## Frequently asked questions about the Varta YT4L-BS

### YT4L-BS or YTX4L-4 (FA): which one suits me?

Compared with the YT4L-BS, the Varta YTX4L-4 (FA) has 10 A more cranking power. If your current battery says 50 A or more, choose the YTX4L-4 (FA); if it says 40 A or less, the YT4L-BS is enough. Both measure 114 × 71 × 86 mm, so they fit the same tray.

### Is the Varta 503014004 the same battery as the Varta YT4L-BS?

Yes. 503014004 is the ETN code Varta uses for its YT4L-BS battery, so you can search for it by either code.

### How much does the Varta YT4L-BS weigh?

1.39 kg, with 3 Ah of capacity. For reference, the Varta YTX4L-4 (FA) (3 Ah) weighs 1.4 kg.

### Which side is the positive terminal on the Varta YT4L-BS?

On the YT4L-BS, 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.

### Which charger does the Varta YT4L-BS need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## What it means that the YT4L-BS is AGM

Inside, the YT4L-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 YT4L-BS

- [More motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Varta catalogue](https://bateriasonline.es/en/varta-batteries)

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