# Motobatt MBT9B4 · Motorcycle battery 12V 9Ah 115A

![Motobatt MBT9B4 · Motorcycle battery 12V 9Ah 115A](https://bateriasonline.es/3229-home_default/motobatt-mbt9b4.jpg)

> Motobatt MBT9B4: 9 Ah motorcycle battery, 115 A (EN), 150×70×104 mm, AGM. Equivalent to Exide AGM12-7.1 and Exide ET9B-BS.

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

- **Canonical URL**: https://bateriasonline.es/en/motobatt-mbt9b4
- **Language**: en
- **Brand**: Motobatt
- **Reference**: BOL-MOTOBATT-MBT9B4
- **MPN**: MBT9B4
- **Price**: 110,65 € (VAT incl., Spain)
- **Last updated**: 2026-11-09

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Motobatt |
| Range | MOTOBATT QUADFLEX |
| Application | Motorcycles |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 9 Ah |
| Cold cranking amps (EN) | 115 A |
| Length | 150 mm |
| Width | 70 mm |
| Height | 104 mm |
| Weight | 2.82 kg |
| JIS code | YT9B4 YT9 BBS |

## Quick description

The Motobatt MBT9B4 is a motorcycle battery (AGM) with 12 V, 9 Ah and 115 A cold cranking current, measuring 150 × 70 × 104 mm.

## Description

## The Motobatt MBT9B4 at a glance

The Motobatt MBT9B4 is a motorcycle starter battery: compact, vibration-resistant and with just the right power to turn the starter motor and feed the electronics. With 9 Ah, the MBT9B4 suits motorcycles and scooters that had a battery of that capacity.
At 9 Ah it covers mid-capacity motorcycles, large scooters and light quads. The MBT9B4 belongs to the Motobatt MOTOBATT QUADFLEX range. [See all Motobatt batteries](https://bateriasonline.es/en/motobatt-batteries)

## Equivalents and alternatives to the Motobatt MBT9B4

Other AGM batteries that fit the MBT9B4's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta T9B (FA) | AGM | 8 Ah | 115 A | 150 × 70 × 105 |
| Exide AGM12-7.1 | AGM | 8 Ah | 110 A | 150 × 70 × 105 |
| Exide ET9B-BS | AGM | 8 Ah | 110 A | 150 × 70 × 105 |
| Varta YT9B-BS | AGM | 8 Ah | 115 A | 149 × 70 × 105 |

## Motobatt MBT9B4 vs MBTX9U and MB7U: differences

How the MBT9B4 compares with Motobatt batteries of similar size and capacity:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Motobatt MBT9B4 (this one) | 9 Ah | 115 A | 150 × 70 × 104 | 2.82 kg |
| Motobatt MBTX9U | 10.5 Ah | 160 A | 151 × 87 × 105 | 3.4 kg |
| Motobatt MB7U | 6.5 Ah | 100 A | 151 × 65 × 94 | 2.4 kg |

- Motobatt MBTX9U: 1.5 Ah more, 45 A more cranking power, a different case (151 × 87 × 105 mm).
- Motobatt MB7U: 2.5 Ah less, 15 A less cranking power, a different case (151 × 65 × 94 mm).

## Before ordering the MBT9B4, check this

- Length, width and height of the MBT9B4: 150 × 70 × 104 mm.
- With 9 Ah, the MBT9B4 replaces an original battery of that capacity or slightly less.
- Check the EN amps on your battery: if it says 115 A or less, the MBT9B4 covers your engine.

## Frequently asked questions about the Motobatt MBT9B4

### MBT9B4 or MBTX9U: which one suits me?

Compared with the MBT9B4, the Motobatt MBTX9U has 1.5 Ah more and 45 A more cranking power. If your current battery says 160 A or more, choose the MBTX9U; if it says 115 A or less, the MBT9B4 is enough. Mind the space: the MBTX9U measures 151 × 87 × 105 mm.

### How much does the Motobatt MBT9B4 weigh?

2.82 kg, with 9 Ah of capacity. For reference, the Motobatt MBTX9U (10.5 Ah) weighs 3.4 kg.

### Which battery is equivalent to the Motobatt MBT9B4?

Only other AGM batteries with its dimensions and polarity: Varta T9B (FA), Exide AGM12-7.1 and Exide ET9B-BS. Neither an EFB nor a conventional battery replaces the MBT9B4.

### Does the Motobatt MBT9B4 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.

## AGM technology in the MBT9B4

The MBT9B4 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.

## Other options if you are unsure about the MBT9B4

- [More motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [The whole Motobatt range](https://bateriasonline.es/en/motobatt-batteries)
- [Varta T9B (FA)](https://bateriasonline.es/en/varta-t9b-fa-508909012) · 8 Ah, 115 A, 150×70×105 mm
- [Exide AGM12-7.1](https://bateriasonline.es/en/exide-agm12-7-1) · 8 Ah, 110 A, 150×70×105 mm

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