# Fulbat FTR4A-BS · Motorcycle battery 12V 2.4Ah 45A

![Fulbat FTR4A-BS · Motorcycle battery 12V 2.4Ah 45A](https://bateriasonline.es/659-home_default/fulbat-ftr4a-bs.jpg)

> Fulbat FTR4A-BS: 2.4 Ah motorcycle battery, 45 A (EN), 113×48×85 mm, AGM. Equivalent to Motobatt MT4R. Price on request: ask for a free quote.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-ftr4a-bs
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FTR4A-BS
- **MPN**: FTR4A-BS
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle MF |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 2.4 Ah |
| Cold cranking amps (EN) | 45 A |
| Length | 113 mm |
| Width | 48 mm |
| Height | 85 mm |
| Weight | 1.05 kg |

## Quick description

The Fulbat FTR4A-BS is a motorcycle battery (AGM) with 12 V, 2.4 Ah and 45 A cold cranking current, measuring 113 × 48 × 85 mm.

## Description

## Who the Fulbat FTR4A-BS is for

The Fulbat FTR4A-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 handles frame vibration and idle periods better than an adapted car battery.
At 2.4 Ah it is a small battery, typical of 50 to 125 cc scooters and light motorcycles. The FTR4A-BS belongs to the Fulbat FULBAT Motorcycle MF range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FTR4A-BS

Other AGM batteries that fit the FTR4A-BS's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Motobatt MT4R | AGM | 2.5 Ah | 45 A | 114 × 49 × 86 |

## Fulbat FTR4A-BS vs FT4B-BS: which one to choose?

Torn between the FTR4A-BS and another similar Fulbat? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fulbat FTR4A-BS (this one) | 2.4 Ah | 45 A | 113 × 48 × 85 | 1.05 kg |
| Fulbat FT4B-BS | 2.4 Ah | 40 A | 113 × 38 × 85 | 0.98 kg |

- Fulbat FT4B-BS: the same capacity, 5 A less cranking power, a different case (113 × 38 × 85 mm).

## What to look at before buying the FTR4A-BS

- Check the EN amps on your battery: if it says 45 A or less, the FTR4A-BS covers your engine.
- With 2.4 Ah, the FTR4A-BS replaces an original battery of that capacity or slightly less.
- Length, width and height of the FTR4A-BS: 113 × 48 × 85 mm.

## Frequently asked questions about the Fulbat FTR4A-BS

### FTR4A-BS or FT4B-BS: which one suits me?

Compared with the FTR4A-BS, the Fulbat FT4B-BS has 5 A less cranking power. The FTR4A-BS cranks harder; the FT4B-BS is only a good option if your original battery says 40 A or less. Mind the space: the FT4B-BS measures 113 × 38 × 85 mm.

### How much does the Fulbat FTR4A-BS weigh?

1.05 kg, with 2.4 Ah of capacity. For reference, the Fulbat FT4B-BS (2.4 Ah) weighs 0.98 kg.

### Which battery is equivalent to the Fulbat FTR4A-BS?

Only other AGM batteries with its dimensions and polarity: Motobatt MT4R. Neither an EFB nor a conventional battery replaces the FTR4A-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 FTR4A-BS: AGM technology

The FTR4A-BS is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FTR4A-BS can be fitted in the boot or under a seat with no risk of spills.

## More batteries to compare with the FTR4A-BS

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Fulbat catalogue](https://bateriasonline.es/en/fulbat-batteries)
- [Exide ETR4A-BS](https://bateriasonline.es/en/exide-etr4a-bs) · 2 Ah, 35 A, 115×50×85 mm
- [Varta YTR4A-BS](https://bateriasonline.es/en/varta-ytr4a-bs-502903003) · 2.3 Ah, 30 A, 114×49×86 mm

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