# Fulbat FP12-33 · UPS battery 12V 33Ah

![Fulbat FP12-33 · UPS battery 12V 33Ah](https://bateriasonline.es/714-home_default/fulbat-fp12-33.jpg)

> Fulbat FP12-33: 33 Ah UPS battery, 195×130×178 mm, positive terminal on the left, AGM. Equivalent to Long WPL36-12 and Long WXL12135W.

**Category:** [UPS batteries](https://bateriasonline.es/en/ups-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fp12-33
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FP12-33
- **MPN**: FP12-33
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT FP General Purpose |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 33 Ah |
| Length | 195 mm |
| Width | 130 mm |
| Height | 178 mm |
| Weight | 10.5 kg |
| Polarity | Positive terminal on the left |
| Terminal type | T6 |

## Quick description

Fulbat FP12-33: UPS battery with 12 V and 33 Ah, measuring 195 × 130 × 178 mm, with the positive terminal on the left.

## Description

## The Fulbat FP12-33 at a glance

The Fulbat FP12-33 replaces the original batteries in a UPS. The FP12-33 spends most of its life on float charge, waiting for a power cut.
The FP12-33 belongs to the Fulbat FULBAT FP General Purpose range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## AGM technology in the FP12-33

Inside, the FP12-33 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Fulbat FP12-33 vs FP12-24H and FP12-40: which one to choose?

The real differences between the FP12-33 and the closest Fulbat models:

| Model | Capacity | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|
| Fulbat FP12-33 (this one) | 33 Ah | 195 × 130 × 178 | left | 10.5 kg |
| Fulbat FP12-24H | 24 Ah | 164 × 125 × 174 | – | 8.45 kg |
| Fulbat FP12-40 | 40 Ah | 197 × 165 × 170 | – | 12 kg |

- Fulbat FP12-24H: 9 Ah less, a different case (164 × 125 × 174 mm).
- Fulbat FP12-40: 7 Ah more, a different case (197 × 165 × 170 mm).

## Equivalents and alternatives to the Fulbat FP12-33

As the FP12-33 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) |
|---|---|---|---|
| Long WPL36-12 | AGM | 36 Ah | 197 × 131 × 180 |
| Long WXL12135W | AGM | 36 Ah | 197 × 131 × 180 |

## Fulbat FP12-33 codes and part numbers

Shops, garages and catalogues identify the FP12-33 with these codes:

| Commercial reference | FP12-33 |
|---|---|
| Terminal type | T6 |
| Not to be confused with | Fulbat FP12-2.3 (2.3 Ah) |

## Before ordering the FP12-33, check this

- Your current battery should say about 33 Ah; a little more is also fine.
- Polarity of the FP12-33: positive terminal on the left (if yours has it on the other side, the cables will not reach).
- Measure the space: the FP12-33 takes up 195 × 130 × 178 mm.

## Frequently asked questions about the Fulbat FP12-33

### Fulbat FP12-33 or FP12-24H?

Compared with the FP12-33, the Fulbat FP12-24H has 9 Ah less. With 33 Ah, the FP12-33 runs longer between charges than the FP12-24H (24 Ah). Mind the space: the FP12-24H measures 164 × 125 × 174 mm.

### How much does the Fulbat FP12-33 weigh?

The FP12-33 weighs 10.5 kg. For reference, the Fulbat FP12-24H (24 Ah) weighs 8.45 kg.

### Which battery is equivalent to the Fulbat FP12-33?

Only other AGM batteries with its dimensions and polarity: Long WPL36-12 and Long WXL12135W. Neither an EFB nor a conventional battery replaces the FP12-33.

### Which side is the positive terminal on the Fulbat FP12-33?

The FP12-33 has the positive terminal on the left, looking at the battery from its long side with the terminals closest to you.

### Which charger does the Fulbat FP12-33 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 FP12-33

- [More uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Long WPL36-12](https://bateriasonline.es/en/long-wpl36-12) · 36 Ah, 197×131×180 mm
- [Long WXL12135W](https://bateriasonline.es/en/long-wxl12135w) · 36 Ah, 197×131×180 mm

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