# Fulbat FP12-120 · UPS battery 12V 124.8Ah

![Fulbat FP12-120 · UPS battery 12V 124.8Ah](https://bateriasonline.es/494-home_default/fulbat-fp12-120.jpg)

> Fulbat FP12-120: 124.8 Ah UPS battery, 408×177×225 mm, positive terminal on the left, AGM. Equivalent to Long WPL125-12RN and Long HTP120-12N.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fp12-120
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FP12-120
- **MPN**: FP12-120
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT FP General Purpose |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 124.8 Ah |
| Length | 408 mm |
| Width | 177 mm |
| Height | 225 mm |
| Weight | 35 kg |
| Polarity | Positive terminal on the left |
| Terminal type | T11 |

## Quick description

Fulbat FP12-120: UPS battery with 12 V and 124.8 Ah, measuring 408 × 177 × 225 mm, with the positive terminal on the left.

## Description

## Where the Fulbat FP12-120 fits

The Fulbat FP12-120 replaces the original batteries in a UPS. The FP12-120 spends most of its life on float charge, waiting for a power cut.
The FP12-120 belongs to the Fulbat FULBAT FP General Purpose range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## AGM technology in the FP12-120

Inside, the FP12-120 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Fulbat FP12-120 vs FP12-100 and FP12-150

The real differences between the FP12-120 and the closest Fulbat models:

| Model | Capacity | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|
| Fulbat FP12-120 (this one) | 124.8 Ah | 408 × 177 × 225 | left | 35 kg |
| Fulbat FP12-100 | 104 Ah | 330 × 173 × 220 | left | 28 kg |
| Fulbat FP12-150 | 156 Ah | 483 × 170 × 238.5 | left | 43.2 kg |

- Fulbat FP12-100: 20.80 Ah less, a different case (330 × 173 × 220 mm).
- Fulbat FP12-150: 31.2 Ah more, a different case (483 × 170 × 238.5 mm).

## Equivalents and alternatives to the Fulbat FP12-120

Other AGM batteries that fit the FP12-120's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Long WPL125-12RN | AGM | 125 Ah | 408 × 177 × 224 |
| Long HTP120-12N | AGM | 120 Ah | 408 × 177 × 224 |
| Long WPL120-12N | AGM | 120 Ah | 408 × 177 × 224 |
| Long WPL120-12RN | AGM | 120 Ah | 408 × 177 × 224 |
| Q-Battery 12LS-120 M8 | AGM | 126 Ah | 409 × 176 × 222 |

## Part numbers and codes for the Fulbat FP12-120

Shops, garages and catalogues identify the FP12-120 with these codes:

| Commercial reference | FP12-120 |
|---|---|
| Terminal type | T11 |
| Not to be confused with | Fulbat FP12-12 (12 Ah), Fulbat FP12-100 (104 Ah), Fulbat FP12-20 (20 Ah) |

## Check this before ordering the Fulbat FP12-120

- Your current battery should say about 124.8 Ah; a little more is also fine.
- With the terminals facing you, the positive terminal of the FP12-120 is on the left.
- Length, width and height of the FP12-120: 408 × 177 × 225 mm.

## Frequently asked questions about the Fulbat FP12-120

### FP12-120 or FP12-100: which one suits me?

Compared with the FP12-120, the Fulbat FP12-100 has 20.80 Ah less. With 124.8 Ah, the FP12-120 runs longer between charges than the FP12-100 (104 Ah). Mind the space: the FP12-100 measures 330 × 173 × 220 mm.

### How much does the Fulbat FP12-120 weigh?

35 kg, with 124.8 Ah of capacity. For reference, the Fulbat FP12-100 (104 Ah) weighs 28 kg.

### Which battery is equivalent to the Fulbat FP12-120?

Only other AGM batteries with its dimensions and polarity: Long WPL125-12RN, Long HTP120-12N and Long WPL120-12N. Neither an EFB nor a conventional battery replaces the FP12-120.

### Which side is the positive terminal on the Fulbat FP12-120?

On the FP12-120, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### Which charger does the Fulbat FP12-120 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 FP12-120

- [More uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Long WPL125-12RN](https://bateriasonline.es/en/long-wpl125-12rn) · 125 Ah, 408×177×224 mm
- [Long HTP120-12N](https://bateriasonline.es/en/long-htp120-12n) · 120 Ah, 408×177×224 mm

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