# Fulbat FP6-4.5 · UPS battery 6V 4.5Ah

![Fulbat FP6-4.5 · UPS battery 6V 4.5Ah](https://bateriasonline.es/616-home_default/fulbat-fp6-4-5.jpg)

> Fulbat FP6-4.5: 4.5 Ah UPS battery, 70×47×106 mm, AGM. Equivalent to Long WP4.5-6 and Ritar RT645. Ask for a no-obligation quote.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fp6-4-5
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FP6-4.5
- **MPN**: FP6-4.5
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT FP General Purpose |
| Application | UPS systems |
| Technology | AGM |
| Voltage | 6 V |
| Capacity | 4.5 Ah |
| Length | 70 mm |
| Width | 47 mm |
| Height | 106 mm |
| Weight | 0.81 kg |
| Terminal layout | 5 |
| Terminal type | T1 |

## Quick description

The Fulbat FP6-4.5 is an UPS battery with 6 V and 4.5 Ah, measuring 70 × 47 × 106 mm.

## Description

## The Fulbat FP6-4.5 at a glance

The Fulbat FP6-4.5 is a VRLA AGM battery for UPS and uninterruptible power systems: it stays charged for years waiting for an outage and delivers the energy instantly when it comes. The FP6-4.5 spends most of its life on float charge, waiting for a power cut.
The FP6-4.5 belongs to the Fulbat FULBAT FP General Purpose range. [The full range of Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FP6-4.5

Other AGM batteries that fit the FP6-4.5's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Dimensions (mm) |
|---|---|---|---|
| Long WP4.5-6 | AGM | 4.5 Ah | 70 × 47 × 106 |
| Ritar RT645 | AGM | 4.5 Ah | 70 × 47 × 107 |
| Long WP5-6 | AGM | 5 Ah | 70 × 47 × 106 |
| Long WPS4-6 | AGM | 4 Ah | 70 × 47 × 106 |
| Fulbat FP6-4 | AGM | 4 Ah | 70 × 47 × 106 |
| Fulbat FP6-6 | AGM | 6 Ah | 70 × 47 × 106 |

## Fulbat FP6-4.5 vs FP6-4 and FP6-6: which one to choose?

Torn between the FP6-4.5 and another similar Fulbat? This is what changes:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Fulbat FP6-4.5 (this one) | 4.5 Ah | 70 × 47 × 106 | 0.81 kg |
| Fulbat FP6-4 | 4 Ah | 70 × 47 × 106 | 0.65 kg |
| Fulbat FP6-6 | 6 Ah | 70 × 47 × 106 | 0.9 kg |

- Fulbat FP6-4: 0.5 Ah less, the same dimensions.
- Fulbat FP6-6: 1.5 Ah more, the same dimensions.

## What it means that the FP6-4.5 is AGM

The FP6-4.5 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FP6-4.5 can be fitted in the boot or under a seat with no risk of spills.

## Check this before ordering the Fulbat FP6-4.5

- Measure the space: the FP6-4.5 takes up 70 × 47 × 106 mm.
- With 4.5 Ah, the FP6-4.5 replaces an original battery of that capacity or slightly less.

## Part numbers and codes for the Fulbat FP6-4.5

Look for any of these FP6-4.5 codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | FP6-4.5 |
|---|---|
| Terminal type | T1 |
| Not to be confused with | Fulbat FP6-4 (4 Ah), Fulbat FP6-4.5S (4.5 Ah), Fulbat FP6-5 (5 Ah, positive terminal on the left) |

## Frequently asked questions about the Fulbat FP6-4.5

### FP6-4.5 or FP6-4: which one suits me?

Compared with the FP6-4.5, the Fulbat FP6-4 has 0.5 Ah less. With 4.5 Ah, the FP6-4.5 runs longer between charges than the FP6-4 (4 Ah). Both measure 70 × 47 × 106 mm, so they fit the same tray.

### How much does the Fulbat FP6-4.5 weigh?

0.81 kg, with 4.5 Ah of capacity. For reference, the Fulbat FP6-4 (4 Ah) weighs 0.65 kg.

### Which battery is equivalent to the Fulbat FP6-4.5?

Only other AGM batteries with its dimensions and polarity: Long WP4.5-6, Ritar RT645 and Long WP5-6. Neither an EFB nor a conventional battery replaces the FP6-4.5.

### What is the difference between F1 and F2 terminals?

The tab width: F1 is 4.8 mm and F2 is 6.35 mm. Most UPS units use F2; check your unit's connector before ordering.

## Keep comparing: alternatives to the FP6-4.5

- [All uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [The whole Fulbat range](https://bateriasonline.es/en/fulbat-batteries)
- [Q-Battery 6LS-4.5](https://bateriasonline.es/en/q-battery-6ls-4-5) · 4.5 Ah, 70×47×100 mm

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