Fulmen
Fulmen FK508 · Start-Stop battery 12V 50Ah 800A
Reference: BOL-FULMEN-FK508 · EAN 3661024046442
Fulmen FK508: Start-Stop battery (AGM) with 12 V, 50 Ah and 800 A cold cranking current, measuring 260 × 173 × 206 mm.
Fulmen FK508 · Start-Stop battery 12V 50Ah 800A images
- Voltage
- 12V
- Capacity
- 50Ah
- Cold cranking amps (EN)
- 800A
- Technology
- AGM
- Dimensions (L × W × H)
- 260 × 173 × 206 mm
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14 days to return your order
If it does not fit, you have 14 days from delivery to return it unused.
Does it fit your vehicle? Check by number plate or VIN
Enter your number plate or chassis number (VIN): we check whether this battery is compatible with your vehicle.
Where the Fulmen FK508 fits
The Fulmen FK508 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. It takes repeated discharges without losing capacity the way a conventional battery would.
At 50 Ah it covers petrol compacts and small diesels, the best-selling format in Europe. The FK508 belongs to the Fulmen FULMEN AGM range. The full range of Fulmen batteries
Fulmen FK508 vs FK600 and FK620: differences
What sets the FK508 apart from its neighbours in the Fulmen range:
| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Weight |
|---|---|---|---|---|
| Fulmen FK508 (this one) | 50 Ah | 800 A | 260 × 173 × 206 | 17.5 kg |
| Fulmen FK600 | 60 Ah | 680 A | 242 × 175 × 190 | 17.9 kg |
| Fulmen FK620 | 62 Ah | 680 A | 242 × 175 × 190 | 17.9 kg |
- Fulmen FK600: 10 Ah more, 120 A less cranking power, a different case (242 × 175 × 190 mm).
- Fulmen FK620: 12 Ah more, 120 A less cranking power, a different case (242 × 175 × 190 mm).
Fulmen FK508 codes and part numbers
Look for any of these FK508 codes on your current battery or in the manufacturer's catalogue:
| Commercial reference | FK508 |
|---|---|
| EAN | 3661024046442 |
Equivalents and alternatives to the Fulmen FK508
As the FK508 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 | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EK508 | AGM | 50 Ah | 800 A | 260 × 173 × 206 |
| Tudor TK508 | AGM | 50 Ah | 800 A | 260 × 173 × 206 |
| Deta DK508 | AGM | 50 Ah | 800 A | 260 × 173 × 206 |
Check this before ordering the Fulmen FK508
- Length, width and height of the FK508: 260 × 173 × 206 mm.
- With 50 Ah, the FK508 replaces an original battery of that capacity or slightly less.
- Check the EN amps on your battery: if it says 800 A or less, the FK508 covers your engine.
- The FK508 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.
What it means that the FK508 is AGM
The FK508 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FK508 can be fitted in the boot or under a seat with no risk of spills.
Frequently asked questions about the Fulmen FK508
Fulmen FK508 or FK600?
Compared with the FK508, the Fulmen FK600 has 10 Ah more and 120 A less cranking power. The FK508 cranks harder; the FK600 is only a good option if your original battery says 680 A or less. Mind the space: the FK600 measures 242 × 175 × 190 mm.
Can the Fulmen FK508 be used in a car with Start-Stop?
Yes. As an AGM battery, the FK508 handles automatic engine stop and brake energy recovery, and it can replace an EFB of the same size.
How much does the Fulmen FK508 weigh?
The FK508 weighs 17.5 kg. For reference, the Fulmen FK600 (60 Ah) weighs 17.9 kg.
Which battery is equivalent to the Fulmen FK508?
Only other AGM batteries with its dimensions and polarity: Exide EK508, Tudor TK508 and Deta DK508. Neither an EFB nor a conventional battery replaces the FK508.
Which charger does the Fulmen FK508 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 FK508
- Other start-Stop batteries (AGM and EFB)
- More Fulmen models
- Exide EK508 · 50 Ah, 800 A, 260×173×206 mm
- Tudor TK508 · 50 Ah, 800 A, 260×173×206 mm
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