# Fulbat FTX9-BS GEL · Motorcycle battery 12V 8.4Ah 135A

![Fulbat FTX9-BS GEL · Motorcycle battery 12V 8.4Ah 135A](https://bateriasonline.es/736-home_default/fulbat-ftx9-bs-gel.jpg)

> Fulbat FTX9-BS GEL: 8.4 Ah motorcycle battery, 135 A (EN), 150×87×105 mm, positive terminal on the left, GEL. Equivalent to Motobatt MTX9A.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-ftx9-bs-gel
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FTX9-BS GEL
- **MPN**: FTX9-BS GEL
- **Price**: 55,83 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle GEL |
| Application | Motorcycles |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 8.4 Ah |
| Cold cranking amps (EN) | 135 A |
| Length | 150 mm |
| Width | 87 mm |
| Height | 105 mm |
| Weight | 3.18 kg |
| Polarity | Positive terminal on the left |

## Quick description

The Fulbat FTX9-BS GEL is a motorcycle battery with 12 V, 8.4 Ah and 135 A cold cranking current, measuring 150 × 87 × 105 mm, with the positive terminal on the left.

## Description

## Where the Fulbat FTX9-BS GEL fits

The Fulbat FTX9-BS GEL is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. With 8.4 Ah, the FTX9-BS GEL suits motorcycles and scooters that had a battery of that capacity.
At 8.4 Ah it covers mid-capacity motorcycles, large scooters and light quads. The FTX9-BS GEL belongs to the Fulbat FULBAT Motorcycle GEL range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FTX9-BS GEL

Other gel batteries with the dimensions and polarity of the FTX9-BS GEL: with gel it is best to stay with gel, because the charging profile is different.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Motobatt MTX9A | GEL | 9 Ah | 140 A | 151 × 87 × 105 |

## Fulbat FTX9-BS GEL vs FT12A-BS GEL and FTZ10S GEL: which one to choose?

Torn between the FTX9-BS GEL and another similar Fulbat? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat FTX9-BS GEL (this one) | 8.4 Ah | 135 A | 150 × 87 × 105 | left | 3.18 kg |
| Fulbat FT12A-BS GEL | 10.5 Ah | 175 A | 150 × 88 × 105 | left | 3.4 kg |
| Fulbat FTZ10S GEL | 9.1 Ah | 190 A | 150 × 88 × 93 | left | 3.15 kg |

- Fulbat FT12A-BS GEL: 2.10 Ah more, 40 A more cranking power, the same dimensions.
- Fulbat FTZ10S GEL: 0.70 Ah more, 55 A more cranking power, a different case (150 × 88 × 93 mm).

## Before ordering the FTX9-BS GEL, check this

- Length, width and height of the FTX9-BS GEL: 150 × 87 × 105 mm.
- With the terminals facing you, the positive terminal of the FTX9-BS GEL is on the left.
- Capacity of the FTX9-BS GEL: 8.4 Ah; the same as your current battery or slightly more is fine.
- Check the EN amps on your battery: if it says 135 A or less, the FTX9-BS GEL covers your engine.

## Frequently asked questions about the Fulbat FTX9-BS GEL

### Fulbat FTX9-BS GEL or FT12A-BS GEL?

Compared with the FTX9-BS GEL, the Fulbat FT12A-BS GEL has 2.10 Ah more and 40 A more cranking power. If your current battery says 175 A or more, choose the FT12A-BS GEL; if it says 135 A or less, the FTX9-BS GEL is enough. Both measure 150 × 87 × 105 mm, so they fit the same tray.

### How much does the Fulbat FTX9-BS GEL weigh?

The FTX9-BS GEL weighs 3.18 kg. For reference, the Fulbat FT12A-BS GEL (10.5 Ah) weighs 3.4 kg.

### Which battery is equivalent to the Fulbat FTX9-BS GEL?

For the FTX9-BS GEL, other gel batteries with its size and polarity: Motobatt MTX9A.

### Which side is the positive terminal on the Fulbat FTX9-BS GEL?

The FTX9-BS GEL has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

### Does the Fulbat FTX9-BS GEL 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.

## Inside the FTX9-BS GEL: GEL technology

The FTX9-BS GEL is a gel battery: the electrolyte is immobilised in silica gel. It requires a charger with a specific gel profile.

## More batteries to compare with the FTX9-BS GEL

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Fulbat FT9B-4 GEL](https://bateriasonline.es/en/fulbat-ft9b-4-gel) · 8.4 Ah, 120 A, 150×68×105 mm

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