# MK Battery ES12-6FR HR · Electric wheelchair battery 6V 12Ah

![MK Battery ES12-6FR HR · Electric wheelchair battery 6V 12Ah](https://bateriasonline.es/2885-home_default/mk-battery-es12-6fr-hr.jpg)

> MK Battery ES12-6FR HR: 12 Ah electric wheelchair battery, 150.9×50×99.1 mm, AGM. Equivalent to MK Battery ES12-6 and MK Battery ES12-6 T2.

**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-es12-6fr-hr
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES12-6FR HR
- **MPN**: ES12-6FR HR
- **Price**: 37,93 € (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 | 12 Ah |
| Length | 150.9 mm |
| Width | 50 mm |
| Height | 99.1 mm |
| Weight | 1.84 kg |

## Quick description

The MK Battery ES12-6FR HR is an electric wheelchair battery with 6 V and 12 Ah, measuring 150.9 × 50 × 99.1 mm.

## Description

## The MK Battery ES12-6FR HR at a glance

The MK Battery ES12-6FR HR is a deep-cycle battery for electric wheelchairs: sealed, maintenance-free and built to discharge and recharge every day without losing capacity. The ES12-6FR HR is fitted in pairs: two 12 V batteries in series give the chair's 24 V.
The ES12-6FR HR 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 ES12-6FR HR

Other AGM batteries that fit the ES12-6FR HR's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| MK Battery ES12-6 | AGM | 12 Ah | 150.9 × 50 × 99.1 |
| MK Battery ES12-6 T2 | AGM | 12 Ah | 150.9 × 50 × 99.1 |

## MK Battery ES12-6FR HR vs ES8.2-6S and ES13-6: differences

How the ES12-6FR HR compares with MK Battery batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES12-6FR HR (this one) | 12 Ah | 150.9 × 50 × 99.1 | 1.84 kg |
| MK Battery ES8.2-6S | 9 Ah | 98.6 × 55.9 × 118.1 | 1.7 kg |
| MK Battery ES13-6 | 13 Ah | 108 × 70.1 × 140 | 2.24 kg |

- MK Battery ES8.2-6S: 3 Ah less, a different case (98.6 × 55.9 × 118.1 mm).
- MK Battery ES13-6: 1 Ah more, a different case (108 × 70.1 × 140 mm).

## Inside the ES12-6FR HR: AGM technology

The ES12-6FR HR 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.

## Check this before ordering the MK Battery ES12-6FR HR

- The ES12-6FR HR needs 150.9 × 50 × 99.1 mm of space: measure it with the hold-down clamp in place.
- With 12 Ah, the ES12-6FR HR replaces an original battery of that capacity or slightly less.

## Frequently asked questions about the MK Battery ES12-6FR HR

### ES12-6FR HR or ES8.2-6S: which one suits me?

Compared with the ES12-6FR HR, the MK Battery ES8.2-6S has 3 Ah less. With 12 Ah, the ES12-6FR HR runs longer between charges than the ES8.2-6S (9 Ah). Mind the space: the ES8.2-6S measures 98.6 × 55.9 × 118.1 mm.

### How much does the MK Battery ES12-6FR HR weigh?

1.84 kg, with 12 Ah of capacity. For reference, the MK Battery ES8.2-6S (9 Ah) weighs 1.7 kg.

### Which battery is equivalent to the MK Battery ES12-6FR HR?

Only other AGM batteries with its dimensions and polarity: MK Battery ES12-6 and MK Battery ES12-6 T2. Neither an EFB nor a conventional battery replaces the ES12-6FR HR.

### How much range does the MK Battery ES12-6FR HR give in an electric wheelchair?

It depends on weight, terrain and the chair. As a guide, with 12 Ah per battery an average chair covers several kilometres a day; range drops with hills and cold batteries.

## Keep comparing: alternatives to the ES12-6FR HR

- [Other electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [Full MK Battery catalogue](https://bateriasonline.es/en/mk-batteries)
- [MK Battery ES12-6](https://bateriasonline.es/en/mk-battery-es12-6) · 12 Ah, 150.9×50×99.1 mm
- [MK Battery ES12-6 T2](https://bateriasonline.es/en/mk-battery-es12-6-t2) · 12 Ah, 150.9×50×99.1 mm

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