# MK Battery M31 SLD G · Electric wheelchair battery 12V 97.6Ah

![MK Battery M31 SLD G · Electric wheelchair battery 12V 97.6Ah](https://bateriasonline.es/3587-home_default/mk-battery-m31-sld-g.jpg)

> MK Battery M31 SLD G: 97.6 Ah electric wheelchair battery, 328.4×171.2×247.7 mm, GEL. Equivalent to Deka 8G30H and MK Battery 8G30H.

**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-m31-sld-g
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-M31 SLD G
- **MPN**: M31 SLD G
- **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 | 247.7 mm |
| Weight | 31.07 kg |

## Quick description

The MK Battery M31 SLD G is an electric wheelchair battery with 12 V and 97.6 Ah, measuring 328.4 × 171.2 × 247.7 mm.

## Description

## The MK Battery M31 SLD G at a glance

The MK Battery M31 SLD G is a deep-cycle battery for electric wheelchairs: sealed, maintenance-free and built to discharge and recharge every day without losing capacity. It is fitted as a 12 V pair and takes hundreds of daily cycles, something a starter battery could not handle.
The M31 SLD G belongs to the MK Battery MK GEL range. [More MK Battery batteries](https://bateriasonline.es/en/mk-batteries)

## Equivalents and alternatives to the MK Battery M31 SLD G

Other gel batteries with the dimensions and polarity of the M31 SLD G: with gel it is best to stay with gel, because the charging profile is different.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Deka 8G30H | GEL | 97.6 Ah | 328.4 × 171.2 × 247.7 |
| MK Battery 8G30H | GEL | 97.6 Ah | 328.4 × 171.2 × 247.7 |
| MK Battery E31 SLD G | GEL | 97.6 Ah | 328.4 × 171.2 × 247.7 |

## MK Battery M31 SLD G vs 8G27, 8G31 and 8G31DT: differences

Torn between the M31 SLD G and another similar MK Battery? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery M31 SLD G (this one) | 97.6 Ah | 328.4 × 171.2 × 247.7 | 31.07 kg |
| MK Battery 8G27 | 88 Ah | 325.9 × 166.6 × 241.3 | 28.12 kg |
| MK Battery 8G31 | 97.6 Ah | 328.4 × 171.2 × 237 | 31.07 kg |
| MK Battery 8G31DT | 97.6 Ah | 328.4 × 171.2 × 238.8 | 31.07 kg |
| MK Battery E27 SLD G | 88 Ah | 325.9 × 166.6 × 237 | 28.12 kg |

- MK Battery 8G27: 9.60 Ah less, a different case (325.9 × 166.6 × 241.3 mm).
- MK Battery 8G31: the same capacity, a different height (237 mm instead of 247.7 mm). It is the option if your battery tray cannot take the 247.7 mm height of the M31 SLD G.
- MK Battery 8G31DT: the same capacity, a different height (238.8 mm instead of 247.7 mm). It is the option if your battery tray cannot take the 247.7 mm height of the M31 SLD G.
- MK Battery E27 SLD G: 9.60 Ah less, a different case (325.9 × 166.6 × 237 mm).

## Inside the M31 SLD G: GEL technology

The M31 SLD G is a gel battery: the electrolyte is immobilised in silica gel. It requires a charger with a specific gel profile.

## What to look at before buying the M31 SLD G

- Length, width and height of the M31 SLD G: 328.4 × 171.2 × 247.7 mm.
- Your current battery should say about 97.6 Ah; a little more is also fine.

## MK Battery M31 SLD G codes and part numbers

The M31 SLD G is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | M31 SLD G |
|---|---|
| Not to be confused with | MK Battery M34 SLD G (60 Ah), MK Battery MU-1 SLD G (31.6 Ah) |

## Frequently asked questions about the MK Battery M31 SLD G

### MK Battery M31 SLD G or 8G27?

Compared with the M31 SLD G, the MK Battery 8G27 has 9.60 Ah less. With 97.6 Ah, the M31 SLD G runs longer between charges than the 8G27 (88 Ah). Mind the space: the 8G27 measures 325.9 × 166.6 × 241.3 mm.

### MK Battery M31 SLD G or 8G31/8G31DT: what changes?

Mainly the height: the M31 SLD G is 247.7 mm tall and the MK Battery 8G31 237 mm, with the same length and width and 97.6 Ah against 97.6 Ah. The MK Battery 8G31DT is 238.8 mm tall, with 97.6 Ah and A. Before choosing between the M31 SLD G and the 8G31, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the MK Battery M31 SLD G weigh?

The M31 SLD G weighs 31.07 kg. For reference, the MK Battery 8G27 (88 Ah) weighs 28.12 kg.

### Which battery is equivalent to the MK Battery M31 SLD G?

For the M31 SLD G, other gel batteries with its size and polarity: Deka 8G30H, MK Battery 8G30H and MK Battery E31 SLD G.

### Which charger does the MK Battery M31 SLD G need?

A charger with a GEL mode not exceeding 14.1-14.4 V. Charging it with a conventional lead-acid profile damages it through overcharging.

## Other options if you are unsure about the M31 SLD G

- [More electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [The whole MK Battery range](https://bateriasonline.es/en/mk-batteries)
- [Deka 8G30H](https://bateriasonline.es/en/deka-8g30h) · 97.6 Ah, 328.4×171.2×247.7 mm
- [MK Battery 8G30H](https://bateriasonline.es/en/mk-battery-8g30h) · 97.6 Ah, 328.4×171.2×247.7 mm

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