# MK Battery ES20-12C · Electric wheelchair battery 12V 20Ah

![MK Battery ES20-12C · Electric wheelchair battery 12V 20Ah](https://bateriasonline.es/2916-home_default/mk-battery-es20-12c.jpg)

> MK Battery ES20-12C: 20 Ah electric wheelchair battery, 181.1×75.9×166.9 mm, AGM. Equivalent to Long WP20-12 and Long WP20-12I.

**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-es20-12c
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-ES20-12C
- **MPN**: ES20-12C
- **Price**: 63,90 € (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 | 20 Ah |
| Length | 181.1 mm |
| Width | 75.9 mm |
| Height | 166.9 mm |
| Weight | 5.94 kg |

## Quick description

MK Battery ES20-12C: electric wheelchair battery with 12 V and 20 Ah, measuring 181.1 × 75.9 × 166.9 mm.

## Description

## Who the MK Battery ES20-12C is for

The MK Battery ES20-12C is a deep-cycle battery for electric wheelchairs: sealed, maintenance-free and built to discharge and recharge every day without losing capacity. The ES20-12C is fitted in pairs: two 12 V batteries in series give the chair's 24 V.
The ES20-12C belongs to the MK Battery MK AGM range. [The full range of MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## Equivalents and alternatives to the MK Battery ES20-12C

Other AGM batteries that fit the ES20-12C's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Long WP20-12 | AGM | 20 Ah | 181 × 76 × 167 |
| Long WP20-12I | AGM | 20 Ah | 181 × 76 × 167 |
| Long WP20-12N | AGM | 20 Ah | 181 × 76 × 167 |
| Long WP20-12U | AGM | 20 Ah | 181 × 76 × 167 |
| Long WP20-12IE | AGM | 20 Ah | 181 × 76 × 167 |
| Kronobat ES20-12CFT | AGM | 20 Ah | 181 × 76 × 167 |

## MK Battery ES20-12C vs ES17-12 and ES17-12S: which one to choose?

What sets the ES20-12C apart from its neighbours in the MK Battery range:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery ES20-12C (this one) | 20 Ah | 181.1 × 75.9 × 166.9 | 5.94 kg |
| MK Battery ES17-12 | 18 Ah | 181.1 × 75.9 × 166.9 | 5.85 kg |
| MK Battery ES17-12S | 18 Ah | 181.1 × 75.9 × 166.9 | 5.85 kg |

- MK Battery ES17-12: 2 Ah less, the same dimensions.
- MK Battery ES17-12S: 2 Ah less, the same dimensions.

## Inside the ES20-12C: AGM technology

The ES20-12C 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 ES20-12C

- Length, width and height of the ES20-12C: 181.1 × 75.9 × 166.9 mm.
- Your current battery should say about 20 Ah; a little more is also fine.

## Frequently asked questions about the MK Battery ES20-12C

### ES20-12C or ES17-12: which one suits me?

Compared with the ES20-12C, the MK Battery ES17-12 has 2 Ah less. With 20 Ah, the ES20-12C runs longer between charges than the ES17-12 (18 Ah). Both measure 181.1 × 75.9 × 166.9 mm, so they fit the same tray.

### How much does the MK Battery ES20-12C weigh?

5.94 kg, with 20 Ah of capacity. For reference, the MK Battery ES17-12 (18 Ah) weighs 5.85 kg.

### Which battery is equivalent to the MK Battery ES20-12C?

Only other AGM batteries with its dimensions and polarity: Long WP20-12, Long WP20-12I and Long WP20-12N. Neither an EFB nor a conventional battery replaces the ES20-12C.

### How much range does the MK Battery ES20-12C give in an electric wheelchair?

It depends on weight, terrain and the chair. As a guide, with 20 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 ES20-12C

- [Other electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [More MK Battery models](https://bateriasonline.es/en/mk-batteries)
- [MK Battery ES20-6](https://bateriasonline.es/en/mk-battery-es20-6) · 20 Ah, 155×80×125 mm

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