# Fulbat U1-12 SLA · Lawn mower battery 12V 32Ah 400A

![Fulbat U1-12 SLA · Lawn mower battery 12V 32Ah 400A](https://bateriasonline.es/630-home_default/fulbat-u1-12-sla.jpg)

> Fulbat U1-12 SLA: 32 Ah lawn mower battery, 400 A (EN), 195×125×176 mm, positive terminal on the left, AGM. Ask for a no-obligation 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-u1-12-sla
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-U1-12 SLA
- **MPN**: U1-12 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 | 32 Ah |
| Cold cranking amps (EN) | 400 A |
| Length | 195 mm |
| Width | 125 mm |
| Height | 176 mm |
| Weight | 6.7 kg |
| Polarity | Positive terminal on the left |

## Quick description

The Fulbat U1-12 SLA is a lawn mower battery with 12 V, 32 Ah and 400 A cold cranking current, measuring 195 × 125 × 176 mm, with the positive terminal on the left. With the positive terminal on the right, the exact counterpart is the Fulbat U1R-12 SLA.

## Description

## Who the Fulbat U1-12 SLA is for

The Fulbat U1-12 SLA is a starter battery for ride-on mowers and garden machinery: small, 12 V and with enough cranking power for single-cylinder engines. Check polarity and terminal type: garden machinery uses several formats.
The U1-12 SLA belongs to the Fulbat FULBAT Lawn & Garden SLA range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat U1-12 SLA

We have no other battery with exactly the dimensions and polarity of the U1-12 SLA. Browse the rest of our [lawn mower and garden machinery batteries](https://bateriasonline.es/en/lawn-mower-garden-batteries) to compare close options.

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

Torn between the U1-12 SLA and another similar Fulbat? This is what changes:

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

- Fulbat U1-9 SLA: 4 Ah less, 100 A less cranking power, the same dimensions.
- Fulbat U1R-12 SLA: identical to the U1-12 SLA except for the positive terminal, which is on the other side (positive terminal on the right).

## Inside the U1-12 SLA: AGM technology

The U1-12 SLA is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the U1-12 SLA can be fitted in the boot or under a seat with no risk of spills.

## What to look at before buying the U1-12 SLA

- The U1-12 SLA needs 195 × 125 × 176 mm of space: measure it with the hold-down clamp in place.
- With the terminals facing you, the positive terminal of the U1-12 SLA is on the left.
- With 32 Ah, the U1-12 SLA replaces an original battery of that capacity or slightly less.
- Cold cranking: 400 A (EN), equal to or higher than the original.

## Part numbers and codes for the Fulbat U1-12 SLA

Look for any of these U1-12 SLA codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | U1-12 SLA |
|---|---|
| Not to be confused with | Fulbat U1R-12 SLA (32 Ah, 400 A, positive terminal on the right) |

## Frequently asked questions about the Fulbat U1-12 SLA

### U1-12 SLA or U1-9 SLA: which one suits me?

Compared with the U1-12 SLA, the Fulbat U1-9 SLA has 4 Ah less and 100 A less cranking power. The U1-12 SLA cranks harder; the U1-9 SLA is only a good option if your original battery says 300 A or less. Both measure 195 × 125 × 176 mm, so they fit the same tray.

### Fulbat U1-12 SLA or U1R-12 SLA: what is the difference?

Only the polarity: the U1-12 SLA has the positive terminal on the left and the U1R-12 SLA the positive terminal on the right. Capacity (32 Ah), cranking power and dimensions are identical.

### How much does the Fulbat U1-12 SLA weigh?

6.7 kg, with 32 Ah of capacity. For reference, the Fulbat U1-9 SLA (28 Ah) weighs 6.45 kg.

### Why is the mower battery dead every spring?

Because it spends the winter discharging. Charge it before storing the machine and give it a maintenance charge every two months, or disconnect it.

## Keep comparing: alternatives to the U1-12 SLA

- [More lawn mower and garden machinery batteries](https://bateriasonline.es/en/lawn-mower-garden-batteries)
- [More Fulbat models](https://bateriasonline.es/en/fulbat-batteries)

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