# Fulmen FK600 · Start-Stop battery 12V 60Ah 680A

![Fulmen FK600 · Start-Stop battery 12V 60Ah 680A](https://bateriasonline.es/2647-home_default/fulmen-fk600.jpg)

> Fulmen FK600: 60 Ah Start-Stop battery, 680 A (EN), 242×175×190 mm, positive terminal on the right, L2 case, AGM. Equivalent to Exide EK620 and Tudor TK620.

**Category:** [Start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb) → [Fulmen](https://bateriasonline.es/en/fulmen-batteries)

- **Canonical URL**: https://bateriasonline.es/en/fulmen-fk600
- **Language**: en
- **Brand**: Fulmen
- **Reference**: BOL-FULMEN-FK600
- **EAN**: 3661024046282
- **MPN**: FK600
- **Last updated**: 2026-11-07

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Fulmen |
| Range | FULMEN AGM |
| Application | Start-Stop cars |
| Technology | AGM |
| Voltage | 12 V |
| Capacity | 60 Ah |
| Cold cranking amps (EN) | 680 A |
| Length | 242 mm |
| Width | 175 mm |
| Height | 190 mm |
| Weight | 17.9 kg |
| Polarity | Positive terminal on the right |
| Case size | L2 (242 × 175 × 190 mm) |

## Quick description

Fulmen FK600: Start-Stop battery (AGM) with 12 V, 60 Ah and 680 A cold cranking current, case size L2 (242 × 175 × 190 mm), with the positive terminal on the right.

## Description

## The Fulmen FK600 at a glance

The Fulmen FK600 is a battery for cars with Start-Stop: it withstands many more starting and partial-discharge cycles than a conventional battery and powers the electronics every time the engine stops at the lights. The FK600 is designed for cars that switch the engine off at every stop and restart it dozens of times per trip.
At 60 Ah it covers petrol compacts and small diesels, the best-selling format in Europe. The FK600 belongs to the Fulmen FULMEN AGM range. [The full range of Fulmen batteries](https://bateriasonline.es/en/fulmen-batteries)

## Part numbers and codes for the Fulmen FK600

The FK600 is listed under these codes on labels, in garages and in catalogues:

| Commercial reference | FK600 |
|---|---|
| EAN | 3661024046282 |
| Case size (EN) | L2 |
| Not to be confused with | Fulmen FK620 (62 Ah, 680 A), Fulmen FK700 (70 Ah, 760 A), Fulmen FK800 (80 Ah, 800 A) |

## Fulmen FK600 vs FK620 and FK508

The real differences between the FK600 and the closest Fulmen models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FK600 (this one) | 60 Ah | 680 A | 242 × 175 × 190 | right | 17.9 kg |
| Fulmen FK620 | 62 Ah | 680 A | 242 × 175 × 190 | right | 17.9 kg |
| Fulmen FK508 | 50 Ah | 800 A | 260 × 173 × 206 | – | 17.5 kg |

- Fulmen FK620: 2 Ah more, the same cranking power, the same L2 case.
- Fulmen FK508: 10 Ah less, 120 A more cranking power, a different case (260 × 173 × 206 mm).

## Equivalents and alternatives to the Fulmen FK600

Other AGM batteries that fit the FK600's tray with the same polarity: an AGM can only be replaced by another AGM.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta A8 | AGM | 60 Ah | 680 A | 242 × 175 × 190 |
| Deta DK600 | AGM | 60 Ah | 680 A | 242 × 175 × 190 |
| Exide EK620 | AGM | 62 Ah | 680 A | 242 × 175 × 190 |
| Tudor TK620 | AGM | 62 Ah | 680 A | 242 × 175 × 190 |
| Deta DK620 | AGM | 62 Ah | 680 A | 242 × 175 × 190 |
| Fulmen FK620 | AGM | 62 Ah | 680 A | 242 × 175 × 190 |

Its Bosch equivalent is the Bosch S5 A05, the same as for the Varta A8. Bosch is not part of our catalogue; we list it so you can compare.

## Inside the FK600: AGM technology

The FK600 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. It withstands many more cycles than a conventional lead battery, at the cost of being more sensitive to overcharging.

## Check this before ordering the Fulmen FK600

- The FK600 is AGM: it replaces an AGM or an EFB of the same size. You can swap an EFB for an AGM, but not an AGM for an EFB.
- The FK600 delivers 680 A cold cranking (EN standard); do not go below what your original battery states.
- With 60 Ah, the FK600 replaces an original battery of that capacity or slightly less.
- The FK600 has the positive terminal on the right: compare it with your current battery.
- Length, width and height of the FK600: 242 × 175 × 190 mm (European case size L2).

## Frequently asked questions about the Fulmen FK600

### FK600 or FK620: which one suits me?

Compared with the FK600, the Fulmen FK620 has 2 Ah more. With the same cranking power (680 A), the FK600 and the FK620 differ in capacity: the one with more Ah supports more load with the engine off. Both measure 242 × 175 × 190 mm, so they fit the same tray.

### Can the Fulmen FK600 be used in a car with Start-Stop?

Yes. As an AGM battery, the FK600 handles automatic engine stop and brake energy recovery, and it can replace an EFB of the same size.

### How much does the Fulmen FK600 weigh?

17.9 kg, with 60 Ah of capacity. For reference, the Fulmen FK620 (62 Ah) weighs 17.9 kg.

### Which battery is equivalent to the Fulmen FK600?

Only other AGM batteries with its dimensions and polarity: Varta A8, Deta DK600 and Exide EK620. Neither an EFB nor a conventional battery replaces the FK600. Its Bosch equivalent is the Bosch S5 A05, the same as for the Varta A8. Bosch is not part of our catalogue; we list it so you can compare.

### What case size is the Fulmen FK600?

Case size L2: 242 × 175 × 190 mm. The FK600 fits any standard L2 battery tray such as the Varta A8.

### Which side is the positive terminal on the Fulmen FK600?

On the FK600, the positive terminal is on the right with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.

### Which charger does the Fulmen FK600 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.

## More batteries to compare with the FK600

- [More start-Stop batteries (AGM and EFB)](https://bateriasonline.es/en/start-stop-batteries-agm-efb)
- [Full Fulmen catalogue](https://bateriasonline.es/en/fulmen-batteries)
- [Exide EK508](https://bateriasonline.es/en/exide-ek508) · 50 Ah, 800 A, 260×173×206 mm

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