# Varta YTX14AH-BS · Motorcycle battery 12V 12Ah 210A

![Varta YTX14AH-BS · Motorcycle battery 12V 12Ah 210A](https://bateriasonline.es/1180-home_default/varta-ytx14ah-bs-512908021.jpg)

> Varta YTX14AH-BS (ETN 512908021): 12 Ah motorcycle battery, 210 A (EN), 134×89×166 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-ytx14ah-bs-512908021
- **Language**: en
- **Brand**: Varta
- **Reference**: BOL-VARTA-512908021
- **EAN**: 4016987149713
- **MPN**: 512908021
- **Price**: 54,68 € (VAT incl., Spain)
- **Last updated**: 2026-11-09

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Varta |
| Range | VARTA PowerSports AGM High Performance |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 12 Ah |
| Cold cranking amps (EN) | 210 A |
| Length | 134 mm |
| Width | 89 mm |
| Height | 166 mm |
| Weight | 5.02 kg |
| Polarity | Positive terminal on the right |
| ETN code | 512908021 |
| JIS code | YTX14 AH-BS |

## Quick description

The Varta YTX14AH-BS (ETN 512 908 021, also written 512908021) is a motorcycle battery (AGM) with 12 V, 12 Ah and 210 A cold cranking current, measuring 134 × 89 × 166 mm, with the positive terminal on the right.

## Description

## Where the Varta YTX14AH-BS fits

The Varta YTX14AH-BS is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. It is worth keeping the YTX14AH-BS on a maintenance charger if the bike is laid up over winter.
At 12 Ah it covers mid-capacity motorcycles, large scooters and light quads. Varta lists the YTX14AH-BS in its Powersports AGM High Performance line. [More Varta batteries](https://bateriasonline.es/en/varta-batteries)

## Varta YTX14AH-BS codes and part numbers

The YTX14AH-BS is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | YTX14AH-BS |
|---|---|
| ETN code | 512908021 (also 512 908 021) |
| Manufacturer short code | TX14AH-BS |
| EAN | 4016987149713 |
| Base hold-down | B00 |
| Also known as | Varta 512908021 · Varta 512 908 021 · Varta TX14AH-BS |

## Equivalents and alternatives to the Varta YTX14AH-BS

As the YTX14AH-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 AGM12-14 | AGM | 12 Ah | 210 A | 135 × 90 × 165 |
| Exide ETX14AHL-BS | AGM | 12 Ah | 210 A | 135 × 90 × 165 |
| Fulbat FTX14AHL-BS | AGM | 12.6 Ah | 210 A | 135 × 90 × 167 |
| Varta YTX14AHL-BS | AGM | 12 Ah | 210 A | 134 × 89 × 166 |
| Varta TX14AHL (FA) | AGM | 12 Ah | 210 A | 133 × 90 × 164 |

## Varta YTX14AH-BS vs B12AL (FA) and B10L (FA)

How the YTX14AH-BS compares with Varta batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Varta YTX14AH-BS (this one) | 12 Ah | 210 A | 134 × 89 × 166 | right | 5.02 kg |
| Varta B12AL (FA) | 12 Ah | 125 A | 134 × 81 × 160 | right | 3.88 kg |
| Varta B10L (FA) | 10 Ah | 120 A | 133 × 90 × 142 | right | 3.68 kg |

- Varta B12AL (FA): the same capacity, 85 A less cranking power, a different case (134 × 81 × 160 mm).
- Varta B10L (FA): 2 Ah less, 90 A less cranking power, a different case (133 × 90 × 142 mm).

## Check this before ordering the Varta YTX14AH-BS

- Length, width and height of the YTX14AH-BS: 134 × 89 × 166 mm.
- The YTX14AH-BS has the positive terminal on the right: compare it with your current battery.
- Capacity of the YTX14AH-BS: 12 Ah; the same as your current battery or slightly more is fine.
- Cold cranking: 210 A (EN), equal to or higher than the original.

## Frequently asked questions about the Varta YTX14AH-BS

### Varta YTX14AH-BS or B12AL (FA)?

Compared with the YTX14AH-BS, the Varta B12AL (FA) has 85 A less cranking power. The YTX14AH-BS cranks harder; the B12AL (FA) is only a good option if your original battery says 125 A or less. Mind the space: the B12AL (FA) measures 134 × 81 × 160 mm.

### Is the Varta 512908021 the same battery as the Varta YTX14AH-BS?

Yes. 512908021 is the ETN code Varta uses for its YTX14AH-BS battery, so you can search for it by either code.

### How much does the Varta YTX14AH-BS weigh?

The YTX14AH-BS weighs 5.02 kg. For reference, the Varta B12AL (FA) (12 Ah) weighs 3.88 kg.

### Which battery is equivalent to the Varta YTX14AH-BS?

Only other AGM batteries with its dimensions and polarity: Exide AGM12-14, Exide ETX14AHL-BS and Fulbat FTX14AHL-BS. Neither an EFB nor a conventional battery replaces the YTX14AH-BS.

### Which side is the positive terminal on the Varta YTX14AH-BS?

The YTX14AH-BS has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you.

### Which charger does the Varta YTX14AH-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.

## AGM technology in the YTX14AH-BS

The YTX14AH-BS is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Keep comparing: alternatives to the YTX14AH-BS

- [Other motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [The whole Varta range](https://bateriasonline.es/en/varta-batteries)
- [Exide AGM12-14](https://bateriasonline.es/en/exide-agm12-14) · 12 Ah, 210 A, 135×90×165 mm
- [Exide ETX14AHL-BS](https://bateriasonline.es/en/exide-etx14ahl-bs) · 12 Ah, 210 A, 135×90×165 mm

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