# Fulbat FHD20HL-BS GEL · Motorcycle battery 12V 21.1Ah 310A

![Fulbat FHD20HL-BS GEL · Motorcycle battery 12V 21.1Ah 310A](https://bateriasonline.es/326-home_default/fulbat-fhd20hl-bs-gel.jpg)

> Fulbat FHD20HL-BS GEL: 21.1 Ah motorcycle battery, 310 A (EN), 175×87×155 mm, positive terminal on the right.

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

- **Canonical URL**: https://bateriasonline.es/en/fulbat-fhd20hl-bs-gel
- **Language**: en
- **Brand**: Fulbat
- **Reference**: BOL-FULBAT-FHD20HL-BS GEL
- **MPN**: FHD20HL-BS GEL
- **Price**: 132,67 € (VAT incl., Spain)
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulbat |
| Range | FULBAT Motorcycle GEL |
| Application | Motorcycles |
| Technology | GEL |
| Voltage | 12 V |
| Capacity | 21.1 Ah |
| Cold cranking amps (EN) | 310 A |
| Length | 175 mm |
| Width | 87 mm |
| Height | 155 mm |
| Weight | 6.36 kg |
| Polarity | Positive terminal on the right |

## Quick description

Fulbat FHD20HL-BS GEL: motorcycle battery with 12 V, 21.1 Ah and 310 A cold cranking current, measuring 175 × 87 × 155 mm, with the positive terminal on the right.

## Description

## Who the Fulbat FHD20HL-BS GEL is for

The Fulbat FHD20HL-BS GEL is made for motorcycles, scooters and quads. It is worth keeping the FHD20HL-BS GEL on a maintenance charger if the bike is laid up over winter.
At 21.1 Ah it is a large battery for heavy motorcycles, jet skis and utility quads. The FHD20HL-BS GEL belongs to the Fulbat FULBAT Motorcycle GEL range. [See all Fulbat batteries](https://bateriasonline.es/en/fulbat-batteries)

## Equivalents and alternatives to the Fulbat FHD20HL-BS GEL

Other gel batteries with the dimensions and polarity of the FHD20HL-BS GEL: with gel it is best to stay with gel, because the charging profile is different.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Fulbat FTX20HL-BS GEL | GEL | 18.9 Ah | 310 A | 175 × 87 × 155 |

## Fulbat FHD20HL-BS GEL vs FTX20HL-BS GEL and NH12-20 GEL: differences

What sets the FHD20HL-BS GEL apart from its neighbours in the Fulbat range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulbat FHD20HL-BS GEL (this one) | 21.1 Ah | 310 A | 175 × 87 × 155 | right | 6.36 kg |
| Fulbat FTX20HL-BS GEL | 18.9 Ah | 310 A | 175 × 87 × 155 | right | 6.1 kg |
| Fulbat NH12-20 GEL | 21.1 Ah | 235 A | 186 × 82 × 171 | right | 5.55 kg |

- Fulbat FTX20HL-BS GEL: 2.20 Ah less, the same cranking power, the same dimensions.
- Fulbat NH12-20 GEL: the same capacity, 75 A less cranking power, a different case (186 × 82 × 171 mm).

## What to look at before buying the FHD20HL-BS GEL

- Check the EN amps on your battery: if it says 310 A or less, the FHD20HL-BS GEL covers your engine.
- Capacity of the FHD20HL-BS GEL: 21.1 Ah; the same as your current battery or slightly more is fine.
- Polarity of the FHD20HL-BS GEL: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- The FHD20HL-BS GEL needs 175 × 87 × 155 mm of space: measure it with the hold-down clamp in place.

## Frequently asked questions about the Fulbat FHD20HL-BS GEL

### Fulbat FHD20HL-BS GEL or FTX20HL-BS GEL?

Compared with the FHD20HL-BS GEL, the Fulbat FTX20HL-BS GEL has 2.20 Ah less. With the same cranking power (310 A), the FHD20HL-BS GEL and the FTX20HL-BS GEL differ in capacity: the one with more Ah supports more load with the engine off. Both measure 175 × 87 × 155 mm, so they fit the same tray.

### How much does the Fulbat FHD20HL-BS GEL weigh?

The FHD20HL-BS GEL weighs 6.36 kg. For reference, the Fulbat FTX20HL-BS GEL (18.9 Ah) weighs 6.1 kg.

### Which battery is equivalent to the Fulbat FHD20HL-BS GEL?

For the FHD20HL-BS GEL, other gel batteries with its size and polarity: Fulbat FTX20HL-BS GEL.

### Which side is the positive terminal on the Fulbat FHD20HL-BS GEL?

The FHD20HL-BS GEL has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you.

### Which charger does the Fulbat FHD20HL-BS GEL need?

A charger with a GEL mode not exceeding 14.1-14.4 V. Charging it with a conventional lead-acid profile damages it through overcharging.

## Inside the FHD20HL-BS GEL: GEL technology

Inside, the FHD20HL-BS GEL holds its electrolyte in gel form. It is the classic technology for wheelchairs, scooters, motorhomes and solar.

## Keep comparing: alternatives to the FHD20HL-BS GEL

- [All motorcycle batteries](https://bateriasonline.es/en/motorcycle-batteries)
- [Full Fulbat catalogue](https://bateriasonline.es/en/fulbat-batteries)
- [Fulbat FB16CL-B GEL](https://bateriasonline.es/en/fulbat-fb16cl-b-gel) · 20 Ah, 240 A, 175×100×175 mm
- [Fulbat FTX20-BS GEL](https://bateriasonline.es/en/fulbat-ftx20-bs-gel) · 18.9 Ah, 270 A, 175×87×155 mm
- [Fulbat FTX24HL-BS / F50-N18L-A/A2/A3 GEL](https://bateriasonline.es/en/fulbat-ftx24hl-bs-f50-n18l-a-a2-a3-gel) · 22.1 Ah, 350 A, 205×87×162 mm

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