# MK Battery MU-1 SLD M-33 · Electric wheelchair battery 12V 33Ah

![MK Battery MU-1 SLD M-33 · Electric wheelchair battery 12V 33Ah](https://bateriasonline.es/3617-home_default/mk-battery-mu-1-sld-m-33.jpg)

> MK Battery MU-1 SLD M-33: 33 Ah electric wheelchair battery, 196.1×130×180.1 mm, AGM. Equivalent to Long U1-33H and Long U1-34H.

**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-mu-1-sld-m-33
- **Language**: en
- **Brand**: MK Battery
- **Reference**: BOL-MK-MU-1 SLD M-33
- **MPN**: MU-1 SLD M-33
- **Price**: 139,08 € (VAT incl., Spain)
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | MK Battery |
| Range | MK AGM |
| Application | Electric wheelchairs |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 33 Ah |
| Length | 196.1 mm |
| Width | 130 mm |
| Height | 180.1 mm |
| Weight | 10.48 kg |

## Quick description

MK Battery MU-1 SLD M-33: electric wheelchair battery with 12 V and 33 Ah, measuring 196.1 × 130 × 180.1 mm.

## Description

## Who the MK Battery MU-1 SLD M-33 is for

The MK Battery MU-1 SLD M-33 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 MU-1 SLD M-33 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 MU-1 SLD M-33

Other AGM batteries that fit the MU-1 SLD M-33's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Long U1-33H | AGM | 33 Ah | 197 × 131 × 180 |
| Long U1-34H | AGM | 34 Ah | 197 × 131 × 180 |
| Long U1-34HE | AGM | 34 Ah | 197 × 131 × 180 |
| Kronobat ES34-12 | AGM | 34 Ah | 197 × 131 × 180 |
| Ritar RA12-33 | AGM | 35 Ah | 195 × 130 × 180 |
| Long U1-36HE | AGM | 36 Ah | 197 × 131 × 180 |

## MK Battery MU-1 SLD M-33 vs ES33-12 and MU-1 SLD M: differences

The real differences between the MU-1 SLD M-33 and the closest MK Battery models:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| MK Battery MU-1 SLD M-33 (this one) | 33 Ah | 196.1 × 130 × 180.1 | 10.48 kg |
| MK Battery ES33-12 | 35 Ah | 196.1 × 130 × 180.1 | 10.48 kg |
| MK Battery MU-1 SLD M | 35 Ah | 196.1 × 130 × 180.1 | 10.48 kg |

- MK Battery ES33-12: 2 Ah more, the same dimensions.
- MK Battery MU-1 SLD M: 2 Ah more, the same dimensions.

## What it means that the MU-1 SLD M-33 is AGM

The MU-1 SLD M-33 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the MU-1 SLD M-33 can be fitted in the boot or under a seat with no risk of spills.

## Before ordering the MU-1 SLD M-33, check this

- Measure the space: the MU-1 SLD M-33 takes up 196.1 × 130 × 180.1 mm.
- Capacity of the MU-1 SLD M-33: 33 Ah; the same as your current battery or slightly more is fine.

## Frequently asked questions about the MK Battery MU-1 SLD M-33

### MU-1 SLD M-33 or ES33-12: which one suits me?

Compared with the MU-1 SLD M-33, the MK Battery ES33-12 has 2 Ah more. With 35 Ah, the ES33-12 runs longer between charges than the MU-1 SLD M-33 (33 Ah). Both measure 196.1 × 130 × 180.1 mm, so they fit the same tray.

### How much does the MK Battery MU-1 SLD M-33 weigh?

10.48 kg, with 33 Ah of capacity. For reference, the MK Battery ES33-12 (35 Ah) weighs 10.48 kg.

### Which battery is equivalent to the MK Battery MU-1 SLD M-33?

Only other AGM batteries with its dimensions and polarity: Long U1-33H, Long U1-34H and Long U1-34HE. Neither an EFB nor a conventional battery replaces the MU-1 SLD M-33.

### Which charger does the MK Battery MU-1 SLD M-33 need?

A charger with an AGM mode that limits voltage to about 14.4-14.7 V. Never an old unregulated charger: overcharging dries out an AGM beyond repair.

## Other options if you are unsure about the MU-1 SLD M-33

- [More electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [The whole MK Battery range](https://bateriasonline.es/en/mk-batteries)
- [Long U1-33H](https://bateriasonline.es/en/long-u1-33h) · 33 Ah, 197×131×180 mm
- [Long U1-34H](https://bateriasonline.es/en/long-u1-34h) · 34 Ah, 197×131×180 mm

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