# MK Battery ES2.9-12 · Electric wheelchair battery 12V 2.9Ah

![MK Battery ES2.9-12 · Electric wheelchair battery 12V 2.9Ah](https://bateriasonline.es/2913-home_default/mk-battery-es2-9-12.jpg)

> MK Battery ES2.9-12: 2.9 Ah electric wheelchair battery, 79×55.9×106.9 mm, AGM. Compare sizes and equivalents; 14-day returns.

**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-es2-9-12
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES2.9-12
- **MPN**: ES2.9-12
- **Price**: 40,38 € (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 | 2.9 Ah |
| Length | 79 mm |
| Width | 55.9 mm |
| Height | 106.9 mm |
| Weight | 1.19 kg |
| Terminal type | F1 |

## Quick description

MK Battery ES2.9-12: electric wheelchair battery with 12 V and 2.9 Ah, measuring 79 × 55.9 × 106.9 mm.

## Description

## The MK Battery ES2.9-12 at a glance

The MK Battery ES2.9-12 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 ES2.9-12 belongs to the MK Battery MK AGM range. [See all MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## What it means that the ES2.9-12 is AGM

Inside, the ES2.9-12 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## MK Battery ES2.9-12 vs ES3-12R and ES3-12

What sets the ES2.9-12 apart from its neighbours in the MK Battery range:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES2.9-12 (this one) | 2.9 Ah | 79 × 55.9 × 106.9 | 1.19 kg |
| MK Battery ES3-12R | 2.8 Ah | 133.1 × 33 × 103.9 | 1.12 kg |
| MK Battery ES3-12 | 3 Ah | 134.1 × 67.1 × 65.5 | 1.3 kg |

- MK Battery ES3-12R: 0.10 Ah less, a different case (133.1 × 33 × 103.9 mm).
- MK Battery ES3-12: 0.10 Ah more, a different case (134.1 × 67.1 × 65.5 mm).

## Equivalents and alternatives to the MK Battery ES2.9-12

No other reference in the catalogue fully matches the dimensions and polarity of the ES2.9-12; you will find the closest ones among our [electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries).

## MK Battery ES2.9-12 codes and part numbers

Shops, garages and catalogues identify the ES2.9-12 with these codes:

| Commercial reference | ES2.9-12 |
|---|---|
| Terminal type | F1 |
| Not to be confused with | MK Battery ES1.9-12 (2.3 Ah), MK Battery ES22-12 (22 Ah, positive terminal on the right), MK Battery ES26-12 (26 Ah, positive terminal on the right) |

## Before ordering the ES2.9-12, check this

- With 2.9 Ah, the ES2.9-12 replaces an original battery of that capacity or slightly less.
- The ES2.9-12 needs 79 × 55.9 × 106.9 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the MK Battery ES2.9-12

### MK Battery ES2.9-12 or ES3-12R?

Compared with the ES2.9-12, the MK Battery ES3-12R has 0.10 Ah less. With 2.9 Ah, the ES2.9-12 runs longer between charges than the ES3-12R (2.8 Ah). Mind the space: the ES3-12R measures 133.1 × 33 × 103.9 mm.

### How much does the MK Battery ES2.9-12 weigh?

The ES2.9-12 weighs 1.19 kg. For reference, the MK Battery ES3-12R (2.8 Ah) weighs 1.12 kg.

### Do I have to replace both batteries at once?

Yes. Wheelchairs fit two batteries in series, and a new one next to a worn one becomes unbalanced and lasts much less.

## More batteries to compare with the ES2.9-12

- [More electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [More MK Battery models](https://bateriasonline.es/en/mk-batteries)

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