# Fulbat FP6-2.8 · UPS battery 6V 2.8Ah

![Fulbat FP6-2.8 · UPS battery 6V 2.8Ah](https://bateriasonline.es/608-home_default/fulbat-fp6-2-8.jpg)

> Fulbat FP6-2.8: 2.8 Ah UPS battery, 66×33×103 mm, AGM. Equivalent to Ritar RT628. 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-fp6-2-8
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FP6-2.8
- **MPN**: FP6-2.8
- **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 | 2.8 Ah |
| Length | 66 mm |
| Width | 33 mm |
| Height | 103 mm |
| Weight | 0.55 kg |
| Terminal layout | 5 |
| Terminal type | T1 |

## Quick description

The Fulbat FP6-2.8 is an UPS battery with 6 V and 2.8 Ah, measuring 66 × 33 × 103 mm.

## Description

## Where the Fulbat FP6-2.8 fits

The Fulbat FP6-2.8 replaces the original batteries in a UPS. Check dimensions, terminal type (F1 or F2) and capacity so it fits the unit.
The FP6-2.8 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 FP6-2.8

As the FP6-2.8 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) |
|---|---|---|---|
| Ritar RT628 | AGM | 2.8 Ah | 66 × 33 × 104 |

## Fulbat FP6-2.8 vs FP6-3.2

How the FP6-2.8 compares with Fulbat batteries of similar size and capacity:

| Model | Capacity | Dimensions (mm) | Weight |
|---|---|---|---|
| Fulbat FP6-2.8 (this one) | 2.8 Ah | 66 × 33 × 103 | 0.55 kg |
| Fulbat FP6-3.2 | 3.2 Ah | 134 × 34 × 66 | 0.67 kg |

- Fulbat FP6-3.2: 0.40 Ah more, a different case (134 × 34 × 66 mm).

## AGM technology in the FP6-2.8

Inside, the FP6-2.8 has glass fibre separators (AGM) that hold the electrolyte. It is fitted in cars with advanced Start-Stop and in deep-cycle equipment.

## Check this before ordering the Fulbat FP6-2.8

- The FP6-2.8 needs 66 × 33 × 103 mm of space: measure it with the hold-down clamp in place.
- With 2.8 Ah, the FP6-2.8 replaces an original battery of that capacity or slightly less.

## Fulbat FP6-2.8 codes and part numbers

Shops, garages and catalogues identify the FP6-2.8 with these codes:

| Commercial reference | FP6-2.8 |
|---|---|
| Terminal type | T1 |

## Frequently asked questions about the Fulbat FP6-2.8

### Fulbat FP6-2.8 or FP6-3.2?

Compared with the FP6-2.8, the Fulbat FP6-3.2 has 0.40 Ah more. With 3.2 Ah, the FP6-3.2 runs longer between charges than the FP6-2.8 (2.8 Ah). Mind the space: the FP6-3.2 measures 134 × 34 × 66 mm.

### How much does the Fulbat FP6-2.8 weigh?

The FP6-2.8 weighs 0.55 kg. For reference, the Fulbat FP6-3.2 (3.2 Ah) weighs 0.67 kg.

### Which battery is equivalent to the Fulbat FP6-2.8?

Only other AGM batteries with its dimensions and polarity: Ritar RT628. Neither an EFB nor a conventional battery replaces the FP6-2.8.

### 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.

## More batteries to compare with the FP6-2.8

- [More uPS batteries](https://bateriasonline.es/en/ups-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)
- [Ritar RT628](https://bateriasonline.es/en/ritar-rt628) · 2.8 Ah, 66×33×104 mm

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