# MK Battery ES9-12 · Electric wheelchair battery 12V 9Ah

![MK Battery ES9-12 · Electric wheelchair battery 12V 9Ah](https://bateriasonline.es/3539-home_default/mk-battery-es9-12.jpg)

> MK Battery ES9-12: 9 Ah electric wheelchair battery, 150.9×65×102.1 mm, AGM. Equivalent to Kronobat ES9-12 and Kronobat ES7-12.

**Category:** [Electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries) → [MK Battery](https://bateriasonline.es/en/mk-batteries)

- **Canonical URL**: https://bateriasonline.es/en/mk-battery-es9-12
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES9-12
- **MPN**: ES9-12
- **Price**: 55,08 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | MK Battery |
| Range | MK AGM |
| Application | Electric wheelchairs |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 9 Ah |
| Length | 150.9 mm |
| Width | 65 mm |
| Height | 102.1 mm |
| Weight | 2.69 kg |
| Terminal type | F2 |

## Quick description

The MK Battery ES9-12 is an electric wheelchair battery with 12 V and 9 Ah, measuring 150.9 × 65 × 102.1 mm.

## Description

## Who the MK Battery ES9-12 is for

The MK Battery ES9-12 is made for powered wheelchairs. It is fitted as a 12 V pair and takes hundreds of daily cycles, something a starter battery could not handle.
The ES9-12 belongs to the MK Battery MK AGM range. [More MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## Equivalents and alternatives to the MK Battery ES9-12

Other AGM batteries that fit the ES9-12's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Kronobat ES9-12 | AGM | 9 Ah | 151 × 65 × 102 |
| Kronobat ES7-12 | AGM | 7 Ah | 151 × 65 × 102 |
| MK Battery ES9-12FR | AGM | 9 Ah | 150.9 × 65 × 102.1 |
| MK Battery ES9-12TE | AGM | 9 Ah | 150.9 × 65 × 105.9 |
| MK Battery ES7-12 | AGM | 7.2 Ah | 150.9 × 65 × 102.1 |
| MK Battery ES7-12FR | AGM | 7.2 Ah | 150.9 × 65 × 102.1 |

## MK Battery ES9-12 vs ES7-12, ES10-12S and ES7-12FR: which one to choose?

How the ES9-12 compares with MK Battery batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES9-12 (this one) | 9 Ah | 150.9 × 65 × 102.1 | 2.69 kg |
| MK Battery ES7-12 | 7.2 Ah | 150.9 × 65 × 102.1 | 2.39 kg |
| MK Battery ES10-12S | 10 Ah | 150.9 × 65 × 118.6 | 3.28 kg |
| MK Battery ES7-12FR | 7.2 Ah | 150.9 × 65 × 102.1 | 2.39 kg |

- MK Battery ES7-12: 1.8 Ah less, the same dimensions.
- MK Battery ES10-12S: 1 Ah more, a different height (118.6 mm instead of 102.1 mm). It only fits if there is room for 118.6 mm of height.
- MK Battery ES7-12FR: 1.8 Ah less, the same dimensions.

## What it means that the ES9-12 is AGM

Inside, the ES9-12 has glass fibre separators (AGM) that hold the electrolyte. The ES9-12 needs a charger with an AGM mode that does not exceed 14.7 V.

## Check this before ordering the MK Battery ES9-12

- Length, width and height of the ES9-12: 150.9 × 65 × 102.1 mm.
- Capacity of the ES9-12: 9 Ah; the same as your current battery or slightly more is fine.

## Part numbers and codes for the MK Battery ES9-12

This is how the MK Battery ES9-12 appears on the label and in parts catalogues:

| Commercial reference | ES9-12 |
|---|---|
| Terminal type | F2 |
| Not to be confused with | MK Battery ES1.9-12 (2.3 Ah), MK Battery ES2.9-12 (2.9 Ah), MK Battery ES3-12 (3 Ah) |

## Frequently asked questions about the MK Battery ES9-12

### ES9-12 or ES7-12: which one suits me?

Compared with the ES9-12, the MK Battery ES7-12 has 1.8 Ah less. With 9 Ah, the ES9-12 runs longer between charges than the ES7-12 (7.2 Ah). Both measure 150.9 × 65 × 102.1 mm, so they fit the same tray.

### MK Battery ES9-12 or ES10-12S: what changes?

Mainly the height: the ES9-12 is 102.1 mm tall and the MK Battery ES10-12S 118.6 mm, with the same length and width and 10 Ah against 9 Ah. Before choosing between the ES9-12 and the ES10-12S, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the MK Battery ES9-12 weigh?

2.69 kg, with 9 Ah of capacity. For reference, the MK Battery ES7-12 (7.2 Ah) weighs 2.39 kg.

### Which battery is equivalent to the MK Battery ES9-12?

Only other AGM batteries with its dimensions and polarity: Kronobat ES9-12, Kronobat ES7-12 and MK Battery ES9-12FR. Neither an EFB nor a conventional battery replaces the ES9-12.

### Which charger does the MK Battery ES9-12 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.

## More batteries to compare with the ES9-12

- [Other electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [The whole MK Battery range](https://bateriasonline.es/en/mk-batteries)
- [MK Battery ES9-4](https://bateriasonline.es/en/mk-battery-es9-4) · 9 Ah, 101.1×43.9×102.1 mm

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