# MK Battery ES3-12 · Electric wheelchair battery 12V 3Ah

![MK Battery ES3-12 · Electric wheelchair battery 12V 3Ah](https://bateriasonline.es/2937-home_default/mk-battery-es3-12.jpg)

> MK Battery ES3-12: 3 Ah electric wheelchair battery, 134.1×67.1×65.5 mm, AGM. Equivalent to Kronobat ES3-12.

**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-es3-12
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES3-12
- **MPN**: ES3-12
- **Price**: 34,70 € (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 | 3 Ah |
| Length | 134.1 mm |
| Width | 67.1 mm |
| Height | 65.5 mm |
| Weight | 1.3 kg |
| Terminal type | F1 |

## Quick description

MK Battery ES3-12: electric wheelchair battery with 12 V and 3 Ah, measuring 134.1 × 67.1 × 65.5 mm.

## Description

## Where the MK Battery ES3-12 fits

The MK Battery ES3-12 is made for powered wheelchairs. With 3 Ah per battery, the ES3-12 is designed for a full charge every night.
The ES3-12 belongs to the MK Battery MK AGM range. [More MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## What it means that the ES3-12 is AGM

Inside, the ES3-12 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 ES3-12 vs ES2-12V and ES3-12R: which one to choose?

What sets the ES3-12 apart from its neighbours in the MK Battery range:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES3-12 (this one) | 3 Ah | 134.1 × 67.1 × 65.5 | 1.3 kg |
| MK Battery ES2-12V | 2 Ah | 143 × 23.1 × 64 | 0.65 kg |
| MK Battery ES3-12R | 2.8 Ah | 133.1 × 33 × 103.9 | 1.12 kg |

- MK Battery ES2-12V: 1 Ah less, a different case (143 × 23.1 × 64 mm).
- MK Battery ES3-12R: 0.20 Ah less, a different case (133.1 × 33 × 103.9 mm).

## Equivalents and alternatives to the MK Battery ES3-12

As the ES3-12 is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Kronobat ES3-12 | AGM | 3 Ah | 134 × 67 × 65.5 |

## MK Battery ES3-12 codes and part numbers

Shops, garages and catalogues identify the ES3-12 with these codes:

| Commercial reference | ES3-12 |
|---|---|
| Terminal type | F1 |
| Not to be confused with | MK Battery ES3-12R (2.8 Ah), MK Battery ES33-12 (35 Ah), MK Battery ES5-12 (5 Ah) |

## Check this before ordering the MK Battery ES3-12

- With 3 Ah, the ES3-12 replaces an original battery of that capacity or slightly less.
- Length, width and height of the ES3-12: 134.1 × 67.1 × 65.5 mm.

## Frequently asked questions about the MK Battery ES3-12

### MK Battery ES3-12 or ES2-12V?

Compared with the ES3-12, the MK Battery ES2-12V has 1 Ah less. With 3 Ah, the ES3-12 runs longer between charges than the ES2-12V (2 Ah). Mind the space: the ES2-12V measures 143 × 23.1 × 64 mm.

### How much does the MK Battery ES3-12 weigh?

The ES3-12 weighs 1.3 kg. For reference, the MK Battery ES2-12V (2 Ah) weighs 0.65 kg.

### Which battery is equivalent to the MK Battery ES3-12?

Only other AGM batteries with its dimensions and polarity: Kronobat ES3-12. Neither an EFB nor a conventional battery replaces the ES3-12.

### 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 ES3-12

- [All electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [More MK Battery models](https://bateriasonline.es/en/mk-batteries)
- [Kronobat ES3-12](https://bateriasonline.es/en/kronobat-es3-12) · 3 Ah, 134×67×65.5 mm

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