# MK Battery 8G31 · Electric wheelchair battery 12V 97.6Ah

![MK Battery 8G31 · Electric wheelchair battery 12V 97.6Ah](https://bateriasonline.es/2816-home_default/mk-battery-8g31.jpg)

> MK Battery 8G31: 97.6 Ah electric wheelchair battery, 328.4×171.2×237 mm, GEL. Equivalent to Deka 8G31 and MK Battery E31 SLD G ST.

**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-8g31
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-8G31
- **MPN**: 8G31
- **Price**: 417,28 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | MK Battery |
| Range | MK GEL |
| Application | Electric wheelchairs |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 97.6 Ah |
| Length | 328.4 mm |
| Width | 171.2 mm |
| Height | 237 mm |
| Weight | 31.07 kg |

## Quick description

MK Battery 8G31: electric wheelchair battery with 12 V and 97.6 Ah, measuring 328.4 × 171.2 × 237 mm.

## Description

## Who the MK Battery 8G31 is for

The MK Battery 8G31 is made for powered wheelchairs. The 8G31 is fitted in pairs: two 12 V batteries in series give the chair's 24 V.
The 8G31 belongs to the MK Battery MK GEL range. [The full range of MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## Equivalents and alternatives to the MK Battery 8G31

Gel alternatives to the 8G31, with the same size and polarity: a gel charger does not treat an AGM or a flooded battery the same way.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Deka 8G31 | GEL | 97.6 Ah | 328.4 × 171.5 × 237.2 |
| MK Battery E31 SLD G ST | GEL | 97.6 Ah | 328.4 × 171.2 × 237 |
| MK Battery 8G31DT | GEL | 97.6 Ah | 328.4 × 171.2 × 238.8 |

## MK Battery 8G31 vs E27 SLD G, 8G30H and E31 SLD G

The real differences between the 8G31 and the closest MK Battery models:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery 8G31 (this one) | 97.6 Ah | 328.4 × 171.2 × 237 | 31.07 kg |
| MK Battery E27 SLD G | 88 Ah | 325.9 × 166.6 × 237 | 28.12 kg |
| MK Battery 8G30H | 97.6 Ah | 328.4 × 171.2 × 247.7 | 31.07 kg |
| MK Battery E31 SLD G | 97.6 Ah | 328.4 × 171.2 × 247.7 | 31.07 kg |
| MK Battery M27 SLD G | 88 Ah | 325.9 × 166.6 × 237 | 28.12 kg |

- MK Battery E27 SLD G: 9.60 Ah less, a different case (325.9 × 166.6 × 237 mm).
- MK Battery 8G30H: the same capacity, a different height (247.7 mm instead of 237 mm). It only fits if there is room for 247.7 mm of height.
- MK Battery E31 SLD G: the same capacity, a different height (247.7 mm instead of 237 mm). It only fits if there is room for 247.7 mm of height.
- MK Battery M27 SLD G: 9.60 Ah less, a different case (325.9 × 166.6 × 237 mm).

## What it means that the 8G31 is GEL

Inside, the 8G31 holds its electrolyte in gel form. It is the classic technology for wheelchairs, scooters, motorhomes and solar.

## Check this before ordering the MK Battery 8G31

- Measure the space: the 8G31 takes up 328.4 × 171.2 × 237 mm.
- Your current battery should say about 97.6 Ah; a little more is also fine.

## Part numbers and codes for the MK Battery 8G31

Shops, garages and catalogues identify the 8G31 with these codes:

| Commercial reference | 8G31 |
|---|---|
| Not to be confused with | MK Battery 8G34 (60 Ah), MK Battery 8GU1 (31.6 Ah) |

## Frequently asked questions about the MK Battery 8G31

### 8G31 or E27 SLD G: which one suits me?

Compared with the 8G31, the MK Battery E27 SLD G has 9.60 Ah less. With 97.6 Ah, the 8G31 runs longer between charges than the E27 SLD G (88 Ah). Mind the space: the E27 SLD G measures 325.9 × 166.6 × 237 mm.

### MK Battery 8G31 or 8G30H/E31 SLD G: what changes?

Mainly the height: the 8G31 is 237 mm tall and the MK Battery 8G30H 247.7 mm, with the same length and width and 97.6 Ah against 97.6 Ah. The MK Battery E31 SLD G is 247.7 mm tall, with 97.6 Ah and A. Before choosing between the 8G31 and the 8G30H, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the MK Battery 8G31 weigh?

31.07 kg, with 97.6 Ah of capacity. For reference, the MK Battery E27 SLD G (88 Ah) weighs 28.12 kg.

### Which battery is equivalent to the MK Battery 8G31?

For the 8G31, other gel batteries with its size and polarity: Deka 8G31, MK Battery E31 SLD G ST and MK Battery 8G31DT.

## Other options if you are unsure about the 8G31

- [Other electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [The whole MK Battery range](https://bateriasonline.es/en/mk-batteries)
- [Long LGK100-12N](https://bateriasonline.es/en/long-lgk100-12n) · 100 Ah, 338×170×217 mm
- [Sonnenschein GF12076H](https://bateriasonline.es/en/sonnenschein-gf12076h) · 86 Ah, 330×171×236 mm

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