# Motobatt MTZ5S · Motorcycle battery 12V 4.2Ah 65A

![Motobatt MTZ5S · Motorcycle battery 12V 4.2Ah 65A](https://bateriasonline.es/3789-home_default/motobatt-mtz5s.jpg)

> Motobatt MTZ5S: 4.2 Ah motorcycle battery, 65 A (EN), 113×70×85 mm, GEL. Equivalent to Fulbat FTX4L-BS / FTZ5S GEL.

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

- **Canonical URL**: https://bateriasonline.es/en/motobatt-mtz5s
- **Language**: en
- **Brand**: Motobatt
- **Reference**: BOL-MOTOBATT-MTZ5S
- **MPN**: MTZ5S
- **Price**: 36,02 € (VAT incl., Spain)
- **Last updated**: 2026-11-09

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Motobatt |
| Range | MOTOBATT SUPER GEL |
| Application | Motorcycles |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 4.2 Ah |
| Cold cranking amps (EN) | 65 A |
| Length | 113 mm |
| Width | 70 mm |
| Height | 85 mm |
| Weight | 1.63 kg |
| JIS code | YB4 LB YTX4 LBS |

## Quick description

The Motobatt MTZ5S is a motorcycle battery with 12 V, 4.2 Ah and 65 A cold cranking current, measuring 113 × 70 × 85 mm.

## Description

## Where the Motobatt MTZ5S fits

The Motobatt MTZ5S 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 4.2 Ah it is a small battery, typical of 50 to 125 cc scooters and light motorcycles. The MTZ5S belongs to the Motobatt MOTOBATT SUPER GEL range. [See all Motobatt batteries](https://bateriasonline.es/en/motobatt-batteries)

## Motobatt MTZ5S codes and part numbers

Look for any of these MTZ5S codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | MTZ5S |
|---|---|
| Not to be confused with | Motobatt MTZ6S (6 Ah, 95 A), Motobatt MTZ7S (7 Ah, 95 A) |

## Equivalents and alternatives to the Motobatt MTZ5S

Other gel batteries with the dimensions and polarity of the MTZ5S: with gel it is best to stay with gel, because the charging profile is different.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fulbat FTX4L-BS / FTZ5S GEL | GEL | 5.3 Ah | 70 A | 113 × 70 × 85 |

## Motobatt MTZ5S vs MTX3L, MTX5L and MTX5AL: which one to choose?

Torn between the MTZ5S and another similar Motobatt? This is what changes:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Motobatt MTZ5S (this one) | 4.2 Ah | 65 A | 113 × 70 × 85 | 1.63 kg |
| Motobatt MTX3L | 3 Ah | 35 A | 98 × 56 × 109 | 1.27 kg |
| Motobatt MTX5L | 5 Ah | 70 A | 113 × 70 × 106 | 2.07 kg |
| Motobatt MTX5AL | 5 Ah | 85 A | 119.5 × 60 × 131 | 2.1 kg |

- Motobatt MTX3L: 1.20 Ah less, 30 A less cranking power, a different case (98 × 56 × 109 mm).
- Motobatt MTX5L: 0.80 Ah more, 5 A more cranking power, a different height (106 mm instead of 85 mm). It only fits if there is room for 106 mm of height.
- Motobatt MTX5AL: 0.80 Ah more, 20 A more cranking power, a different case (119.5 × 60 × 131 mm).

## What to look at before buying the MTZ5S

- Cold cranking: 65 A (EN), equal to or higher than the original.
- Capacity of the MTZ5S: 4.2 Ah; the same as your current battery or slightly more is fine.
- Length, width and height of the MTZ5S: 113 × 70 × 85 mm.

## Frequently asked questions about the Motobatt MTZ5S

### Motobatt MTZ5S or MTX3L?

Compared with the MTZ5S, the Motobatt MTX3L has 1.20 Ah less and 30 A less cranking power. The MTZ5S cranks harder; the MTX3L is only a good option if your original battery says 35 A or less. Mind the space: the MTX3L measures 98 × 56 × 109 mm.

### Motobatt MTZ5S or MTX5L: what changes?

Mainly the height: the MTZ5S is 85 mm tall and the Motobatt MTX5L 106 mm, with the same length and width. In capacity and cranking power, the MTX5L offers 5 Ah and 70 A against 4.2 Ah and 65 A. Before choosing between the MTZ5S and the MTX5L, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Motobatt MTZ5S weigh?

The MTZ5S weighs 1.63 kg. For reference, the Motobatt MTX3L (3 Ah) weighs 1.27 kg.

### Which battery is equivalent to the Motobatt MTZ5S?

For the MTZ5S, other gel batteries with its size and polarity: Fulbat FTX4L-BS / FTZ5S GEL.

### 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.

## What it means that the MTZ5S is GEL

The MTZ5S is a gel battery: the electrolyte is immobilised in silica gel. The MTZ5S handles repeated deep discharges well, its strong point compared with an AGM.

## Keep comparing: alternatives to the MTZ5S

- [Other motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [More Motobatt models](https://bateriasonline.es/en/motobatt-batteries)
- [Fulbat 6N4-2A/A-4 GEL](https://bateriasonline.es/en/fulbat-6n4-2a-a-4-gel) · 4.2 Ah, 25 A, 71×71×93 mm

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