# Fulbat FTX12-BS · Motorcycle battery 12V 10.5Ah 180A

![Fulbat FTX12-BS · Motorcycle battery 12V 10.5Ah 180A](https://bateriasonline.es/617-home_default/fulbat-ftx12-bs.jpg)

> Fulbat FTX12-BS: 10.5 Ah motorcycle battery, 180 A (EN), 150×87×130 mm, positive terminal on the left, AGM. Equivalent to Varta YTX12-4 (FA).

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-ftx12-bs
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FTX12-BS
- **MPN**: FTX12-BS
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle MF |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 10.5 Ah |
| Cold cranking amps (EN) | 180 A |
| Length | 150 mm |
| Width | 87 mm |
| Height | 130 mm |
| Weight | 3.83 kg |
| Polarity | Positive terminal on the left |

## Quick description

Fulbat FTX12-BS: motorcycle battery (AGM) with 12 V, 10.5 Ah and 180 A cold cranking current, measuring 150 × 87 × 130 mm, with the positive terminal on the left.

## Description

## Where the Fulbat FTX12-BS fits

The Fulbat FTX12-BS is made for motorcycles, scooters and quads. It is worth keeping the FTX12-BS on a maintenance charger if the bike is laid up over winter.
At 10.5 Ah it covers mid-capacity motorcycles, large scooters and light quads. The FTX12-BS belongs to the Fulbat FULBAT Motorcycle MF range. [More Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Part numbers and codes for the Fulbat FTX12-BS

This is how the Fulbat FTX12-BS appears on the label and in parts catalogues:

| Commercial reference | FTX12-BS |
|---|---|
| Not to be confused with | Fulbat FTX14-BS (12.6 Ah, 200 A), Fulbat FTX16-BS (14.7 Ah, 230 A) |

## Equivalents and alternatives to the Fulbat FTX12-BS

Other AGM batteries that fit the FTX12-BS's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta YTX12-4 (FA) | AGM | 10 Ah | 170 A | 150 × 87 × 130 |

## Fulbat FTX12-BS vs FTX9-BS, FT12A-BS and FTX14-BS: differences

The real differences between the FTX12-BS and the closest Fulbat models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat FTX12-BS (this one) | 10.5 Ah | 180 A | 150 × 87 × 130 | left | 3.83 kg |
| Fulbat FTX9-BS | 8.4 Ah | 135 A | 150 × 87 × 105 | left | 2.99 kg |
| Fulbat FT12A-BS | 10.5 Ah | 175 A | 150 × 88 × 105 | left | 3.5 kg |
| Fulbat FTX14-BS | 12.6 Ah | 200 A | 150 × 87 × 145 | left | 4.29 kg |
| Fulbat FT9A-BS | 9.5 Ah | 115 A | 135 × 75 × 139 | left | 2.87 kg |

- Fulbat FTX9-BS: 2.10 Ah less, 45 A less cranking power, a different case (150 × 87 × 105 mm).
- Fulbat FT12A-BS: the same capacity, 5 A less cranking power, a different height (105 mm instead of 130 mm). It is the option if your battery tray cannot take the 130 mm height of the FTX12-BS.
- Fulbat FTX14-BS: 2.10 Ah more, 20 A more cranking power, a different height (145 mm instead of 130 mm). It only fits if there is room for 145 mm of height.
- Fulbat FT9A-BS: 1 Ah less, 65 A less cranking power, a different case (135 × 75 × 139 mm).

## Check this before ordering the Fulbat FTX12-BS

- The FTX12-BS delivers 180 A cold cranking (EN standard); do not go below what your original battery states.
- Capacity of the FTX12-BS: 10.5 Ah; the same as your current battery or slightly more is fine.
- With the terminals facing you, the positive terminal of the FTX12-BS is on the left.
- The FTX12-BS needs 150 × 87 × 130 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulbat FTX12-BS

### FTX12-BS or FTX9-BS: which one suits me?

Compared with the FTX12-BS, the Fulbat FTX9-BS has 2.10 Ah less and 45 A less cranking power. The FTX12-BS cranks harder; the FTX9-BS is only a good option if your original battery says 135 A or less. Mind the space: the FTX9-BS measures 150 × 87 × 105 mm.

### Fulbat FTX12-BS or FT12A-BS/FTX14-BS: what changes?

Mainly the height: the FTX12-BS is 130 mm tall and the Fulbat FT12A-BS 105 mm, with the same length and width. In capacity and cranking power, the FT12A-BS offers 10.5 Ah and 175 A against 10.5 Ah and 180 A. The Fulbat FTX14-BS is 145 mm tall, with 12.6 Ah and 200 A. Before choosing between the FTX12-BS and the FT12A-BS, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Fulbat FTX12-BS weigh?

3.83 kg, with 10.5 Ah of capacity. For reference, the Fulbat FTX9-BS (8.4 Ah) weighs 2.99 kg.

### Which battery is equivalent to the Fulbat FTX12-BS?

Only other AGM batteries with its dimensions and polarity: Varta YTX12-4 (FA). Neither an EFB nor a conventional battery replaces the FTX12-BS.

### Which side is the positive terminal on the Fulbat FTX12-BS?

On the FTX12-BS, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### Which charger does the Fulbat FTX12-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 FTX12-BS is AGM

Inside, the FTX12-BS has glass fibre separators (AGM) that hold the electrolyte. The FTX12-BS needs a charger with an AGM mode that does not exceed 14.7 V.

## More batteries to compare with the FTX12-BS

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [The whole Fulbat range](https://bateriasonline.es/en/fulbat-batteries)
- [Varta YTX12-BS](https://bateriasonline.es/en/varta-ytx12-bs-510012015) · 10 Ah, 150 A, 152×88×131 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*