# MK Battery ES3.8-6 · Electric wheelchair battery 6V 3.8Ah

![MK Battery ES3.8-6 · Electric wheelchair battery 6V 3.8Ah](https://bateriasonline.es/3475-home_default/mk-battery-es3-8-6.jpg)

> MK Battery ES3.8-6: 3.8 Ah electric wheelchair battery, 66×33×126 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-es3-8-6
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES3.8-6
- **MPN**: ES3.8-6
- **Price**: 30,33 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | MK Battery |
| Range | MK AGM |
| Application | Electric wheelchairs |
| Technology | AGM |
| Voltage | 6 V |
| Capacity | 3.8 Ah |
| Length | 66 mm |
| Width | 33 mm |
| Height | 126 mm |
| Weight | 0.74 kg |
| Terminal type | F1 |

## Quick description

The MK Battery ES3.8-6 is an electric wheelchair battery with 6 V and 3.8 Ah, measuring 66 × 33 × 126 mm.

## Description

## The MK Battery ES3.8-6 at a glance

The MK Battery ES3.8-6 is a deep-cycle battery for electric wheelchairs: sealed, maintenance-free and built to discharge and recharge every day without losing capacity. With 3.8 Ah per battery, the ES3.8-6 is designed for a full charge every night.
The ES3.8-6 belongs to the MK Battery MK AGM range. [See all MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## Equivalents and alternatives to the MK Battery ES3.8-6

No other reference in the catalogue fully matches the dimensions and polarity of the ES3.8-6; you will find the closest ones among our [electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries).

## MK Battery ES3.8-6 vs ES4-6SA, ES3-6H and ES4-6: which one to choose?

How the ES3.8-6 compares with MK Battery batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES3.8-6 (this one) | 3.8 Ah | 66 × 33 × 126 | 0.74 kg |
| MK Battery ES4-6SA | 4 Ah | 70.1 × 47 × 105.9 | 0.74 kg |
| MK Battery ES3-6H | 2.8 Ah | 66 × 33 × 103.9 | 0.57 kg |
| MK Battery ES4-6 | 4.5 Ah | 70.1 × 47 × 105.9 | 0.82 kg |

- MK Battery ES4-6SA: 0.20 Ah more, a different case (70.1 × 47 × 105.9 mm).
- MK Battery ES3-6H: 1 Ah less, a different height (103.9 mm instead of 126 mm). It is the option if your battery tray cannot take the 126 mm height of the ES3.8-6.
- MK Battery ES4-6: 0.70 Ah more, a different case (70.1 × 47 × 105.9 mm).

## Inside the ES3.8-6: AGM technology

The ES3.8-6 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the ES3.8-6 can be fitted in the boot or under a seat with no risk of spills.

## Check this before ordering the MK Battery ES3.8-6

- The ES3.8-6 needs 66 × 33 × 126 mm of space: measure it with the hold-down clamp in place.
- Your current battery should say about 3.8 Ah; a little more is also fine.

## MK Battery ES3.8-6 codes and part numbers

Look for any of these ES3.8-6 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | ES3.8-6 |
|---|---|
| Terminal type | F1 |
| Not to be confused with | MK Battery ES3-6 (3 Ah) |

## Frequently asked questions about the MK Battery ES3.8-6

### MK Battery ES3.8-6 or ES4-6SA?

Compared with the ES3.8-6, the MK Battery ES4-6SA has 0.20 Ah more. With 4 Ah, the ES4-6SA runs longer between charges than the ES3.8-6 (3.8 Ah). Mind the space: the ES4-6SA measures 70.1 × 47 × 105.9 mm.

### MK Battery ES3.8-6 or ES3-6H: what changes?

Mainly the height: the ES3.8-6 is 126 mm tall and the MK Battery ES3-6H 103.9 mm, with the same length and width and 2.8 Ah against 3.8 Ah. Before choosing between the ES3.8-6 and the ES3-6H, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the MK Battery ES3.8-6 weigh?

The ES3.8-6 weighs 0.74 kg. For reference, the MK Battery ES4-6SA (4 Ah) weighs 0.74 kg.

### How much range does the MK Battery ES3.8-6 give in an electric wheelchair?

It depends on weight, terrain and the chair. As a guide, with 3.8 Ah per battery an average chair covers several kilometres a day; range drops with hills and cold batteries.

## Other options if you are unsure about the ES3.8-6

- [All electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [Full MK Battery catalogue](https://bateriasonline.es/en/mk-batteries)

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