# Long U1-33H · Electric wheelchair battery 12V 33Ah

![Long U1-33H · Electric wheelchair battery 12V 33Ah](https://bateriasonline.es/966-home_default/long-u1-33h.jpg)

> Long U1-33H: 33 Ah electric wheelchair battery, 197×131×180 mm, AGM. Equivalent to Kronobat ES34-12 and MK Battery MU-1 SLD M-2. Ask for a no-obligation quote.

**Category:** [Electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries) → [Long](https://bateriasonline.es/en/long-batteries)

- **Canonical URL**: https://bateriasonline.es/en/long-u1-33h
- **Language**: en
- **Brand**: Long
- **Reference**: BOL-LONG-U1-33H
- **MPN**: U1-33H
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Long |
| Range | U1 Series |
| Application | Electric wheelchairs |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 33 Ah |
| Length | 197 mm |
| Width | 131 mm |
| Height | 180 mm |
| Weight | 10.1 kg |

## Quick description

The Long U1-33H is an electric wheelchair battery with 12 V and 33 Ah, measuring 197 × 131 × 180 mm.

## Description

## Who the Long U1-33H is for

The Long U1-33H is made for powered wheelchairs. With 33 Ah per battery, the U1-33H is designed for a full charge every night.
The U1-33H belongs to the Long U1 Series range. [The full range of Long batteries](https://bateriasonline.es/en/long-batteries)

## What it means that the U1-33H is AGM

Inside, the U1-33H has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Long U1-33H vs U1-34H, U1-33HN and U1-34HN: which one to choose?

Torn between the U1-33H and another similar Long? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Long U1-33H (this one) | 33 Ah | 197 × 131 × 180 | 10.1 kg |
| Long U1-34H | 34 Ah | 197 × 131 × 180 | 10.5 kg |
| Long U1-33HN | 33 Ah | 197 × 131 × 168 | 10.1 kg |
| Long U1-34HN | 34 Ah | 197 × 131 × 168 | 10.5 kg |
| Long U1-34HE | 34 Ah | 197 × 131 × 180 | 10.3 kg |

- Long U1-34H: 1 Ah more, the same dimensions.
- Long U1-33HN: the same capacity, a different height (168 mm instead of 180 mm). It is the option if your battery tray cannot take the 180 mm height of the U1-33H.
- Long U1-34HN: 1 Ah more, a different height (168 mm instead of 180 mm). It is the option if your battery tray cannot take the 180 mm height of the U1-33H.
- Long U1-34HE: 1 Ah more, the same dimensions.

## Equivalents and alternatives to the Long U1-33H

As the U1-33H is an AGM battery, we only list other AGM batteries with its dimensions and polarity: neither an EFB nor a conventional battery can replace it.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Kronobat ES34-12 | AGM | 34 Ah | 197 × 131 × 180 |
| MK Battery MU-1 SLD M-2 | AGM | 35 Ah | 197 × 131 × 180 |
| MK Battery MU-1 SLD M-33 | AGM | 33 Ah | 196.1 × 130 × 180.1 |
| MK Battery ES33-12 | AGM | 35 Ah | 196.1 × 130 × 180.1 |
| MK Battery MU-1 SLD M | AGM | 35 Ah | 196.1 × 130 × 180.1 |
| Ritar RA12-33 | AGM | 35 Ah | 195 × 130 × 180 |

## Long U1-33H codes and part numbers

Shops, garages and catalogues identify the U1-33H with these codes:

| Commercial reference | U1-33H |
|---|---|
| Not to be confused with | Long U1-34H (34 Ah) |

## Before ordering the U1-33H, check this

- Capacity of the U1-33H: 33 Ah; the same as your current battery or slightly more is fine.
- The U1-33H needs 197 × 131 × 180 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Long U1-33H

### Long U1-33H or U1-34H?

Compared with the U1-33H, the Long U1-34H has 1 Ah more. With 34 Ah, the U1-34H runs longer between charges than the U1-33H (33 Ah). Both measure 197 × 131 × 180 mm, so they fit the same tray.

### Long U1-33H or U1-33HN/U1-34HN: what changes?

Mainly the height: the U1-33H is 180 mm tall and the Long U1-33HN 168 mm, with the same length and width and 33 Ah against 33 Ah. The Long U1-34HN is 168 mm tall, with 34 Ah and A. Before choosing between the U1-33H and the U1-33HN, measure the free height of the battery compartment with the cover or bonnet closed.

### How much does the Long U1-33H weigh?

The U1-33H weighs 10.1 kg. For reference, the Long U1-34H (34 Ah) weighs 10.5 kg.

### Which battery is equivalent to the Long U1-33H?

Only other AGM batteries with its dimensions and polarity: Kronobat ES34-12, MK Battery MU-1 SLD M-2 and MK Battery MU-1 SLD M-33. Neither an EFB nor a conventional battery replaces the U1-33H.

### Which charger does the Long U1-33H 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.

## Keep comparing: alternatives to the U1-33H

- [All electric wheelchair batteries](https://bateriasonline.es/en/electric-wheelchair-batteries)
- [Full Long catalogue](https://bateriasonline.es/en/long-batteries)
- [Deka 8AU1H](https://bateriasonline.es/en/deka-8au1h) · 32 Ah, 213.6×131.6×183.4 mm

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