# Fulbat U1R-9 SLA · Lawn mower battery 12V 28Ah 300A

![Fulbat U1R-9 SLA · Lawn mower battery 12V 28Ah 300A](https://bateriasonline.es/624-home_default/fulbat-u1r-9-sla.jpg)

> Fulbat U1R-9 SLA: 28 Ah lawn mower battery, 300 A (EN), 195×125×176 mm, positive terminal on the right, AGM. Price on request: ask for a free quote.

**Category:** [Lawn mower and garden machinery batteries](https://bateriasonline.es/en/lawn-mower-garden-batteries) → [Fulbat](https://bateriasonline.es/en/fulbat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulbat-u1r-9-sla
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-U1R-9 SLA
- **MPN**: U1R-9 SLA
- **Last updated**: 2026-10-27

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Lawn & Garden SLA |
| Application | Lawn mowers and garden machinery |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 28 Ah |
| Cold cranking amps (EN) | 300 A |
| Length | 195 mm |
| Width | 125 mm |
| Height | 176 mm |
| Weight | 6.45 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulbat U1R-9 SLA: lawn mower battery with 12 V, 28 Ah and 300 A cold cranking current, measuring 195 × 125 × 176 mm, with the positive terminal on the right. If yours has the positive terminal on the left, you need the Fulbat U1-9 SLA.

## Description

## Who the Fulbat U1R-9 SLA is for

The Fulbat U1R-9 SLA starts ride-on mowers and garden tractors. Check polarity and terminal type: garden machinery uses several formats.
The U1R-9 SLA belongs to the Fulbat FULBAT Lawn & Garden SLA range. [The full range of Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## What it means that the U1R-9 SLA is AGM

Inside, the U1R-9 SLA has glass fibre separators (AGM) that hold the electrolyte. The U1R-9 SLA needs a charger with an AGM mode that does not exceed 14.7 V.

## Fulbat U1R-9 SLA vs U1R-12 SLA, U1-9 SLA and SLA12-22: which one to choose?

What sets the U1R-9 SLA apart from its neighbours in the Fulbat range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat U1R-9 SLA (this one) | 28 Ah | 300 A | 195 × 125 × 176 | right | 6.45 kg |
| Fulbat U1R-12 SLA | 32 Ah | 400 A | 195 × 125 × 176 | right | 6.7 kg |
| Fulbat U1-9 SLA | 28 Ah | 300 A | 195 × 125 × 176 | left | 6.45 kg |
| Fulbat SLA12-22 | 23.1 Ah | 210 A | 182 × 77 × 168 | right | 6.3 kg |

- Fulbat U1R-12 SLA: 4 Ah more, 100 A more cranking power, the same dimensions.
- If the positive terminal of your battery is on the other side, the one you need is the Fulbat U1-9 SLA (positive terminal on the left).
- Fulbat SLA12-22: 4.90 Ah less, 90 A less cranking power, a different case (182 × 77 × 168 mm).

## Equivalents and alternatives to the Fulbat U1R-9 SLA

No other reference in the catalogue fully matches the dimensions and polarity of the U1R-9 SLA; you will find the closest ones among our [lawn mower and garden machinery batteries](https://bateriasonline.es/en/lawn-mower-garden-batteries).

## Fulbat U1R-9 SLA codes and part numbers

This is how the Fulbat U1R-9 SLA appears on the label and in parts catalogues:

| Commercial reference | U1R-9 SLA |
|---|---|
| Not to be confused with | Fulbat U1-9 SLA (28 Ah, 300 A, positive terminal on the left) |

## Before ordering the U1R-9 SLA, check this

- Check the EN amps on your battery: if it says 300 A or less, the U1R-9 SLA covers your engine.
- With 28 Ah, the U1R-9 SLA replaces an original battery of that capacity or slightly less.
- The U1R-9 SLA has the positive terminal on the right: compare it with your current battery.
- Length, width and height of the U1R-9 SLA: 195 × 125 × 176 mm.

## Frequently asked questions about the Fulbat U1R-9 SLA

### Fulbat U1R-9 SLA or U1R-12 SLA?

Compared with the U1R-9 SLA, the Fulbat U1R-12 SLA has 4 Ah more and 100 A more cranking power. If your current battery says 400 A or more, choose the U1R-12 SLA; if it says 300 A or less, the U1R-9 SLA is enough. Both measure 195 × 125 × 176 mm, so they fit the same tray.

### What is the difference between the Fulbat U1R-9 SLA and the U1-9 SLA?

They are the same battery with the terminals swapped: positive terminal on the right on the U1R-9 SLA, positive terminal on the left on the U1-9 SLA. Look at your current battery with the terminals facing you and pick the one that matches.

### How much does the Fulbat U1R-9 SLA weigh?

The U1R-9 SLA weighs 6.45 kg. For reference, the Fulbat U1R-12 SLA (32 Ah) weighs 6.7 kg.

### Which charger does the Fulbat U1R-9 SLA 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 U1R-9 SLA

- [All lawn mower and garden machinery batteries](https://bateriasonline.es/en/lawn-mower-garden-batteries)
- [The whole Fulbat range](https://bateriasonline.es/en/fulbat-batteries)

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