Fulmen
Fulmen FK091 · Auxiliary battery 12V 9Ah 120A
Reference: BOL-FULMEN-FK091 · EAN 3661024046336
The Fulmen FK091 is an auxiliary battery (AGM) with 12 V, 9 Ah and 120 A cold cranking current, measuring 150 × 90 × 105 mm, with the positive terminal on the left.
Fulmen FK091 · Auxiliary battery 12V 9Ah 120A images
- Voltage
- 12V
- Capacity
- 9Ah
- Cold cranking amps (EN)
- 120A
- Technology
- AGM
- Dimensions (L × W × H)
- 150 × 90 × 105 mm
- Polarity
- Positive terminal on the left
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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.
The Fulmen FK091 at a glance
The Fulmen FK091 is an auxiliary vehicle battery: it powers back-up functions such as Start-Stop, electric steering or the emergency system while the main battery starts the engine. Without it, Start-Stop or back-up warnings appear on the dashboard.
The FK091 belongs to the Fulmen FULMEN Start-Stop Auxiliary range. The full range of Fulmen batteries
Equivalents and alternatives to the Fulmen FK091
Other AGM batteries that fit the FK091's tray with the same polarity: an AGM can only be replaced by another AGM.
| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Exide EK091 | AGM | 9 Ah | 120 A | 150 × 90 × 105 |
| Tudor TK091 | AGM | 9 Ah | 120 A | 150 × 90 × 105 |
| Deta DK091 | AGM | 9 Ah | 120 A | 150 × 90 × 105 |
| Varta AUX9 | AGM | 9 Ah | 130 A | 151 × 87 × 106 |
| Kronobat AUX9 | AGM | 9 Ah | 130 A | 151 × 87 × 106 |
| Fulbat AUX9 | AGM | 8.4 Ah | – | 150 × 87 × 105 |
Fulmen FK091 vs FK111
How the FK091 compares with Fulmen batteries of similar size and capacity:
| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Fulmen FK091 (this one) | 9 Ah | 120 A | 150 × 90 × 105 | left | 3.1 kg |
| Fulmen FK111 | 11 Ah | 150 A | 150 × 90 × 130 | left | 3.9 kg |
- Fulmen FK111: 2 Ah more, 30 A more cranking power, a different case (150 × 90 × 130 mm).
What it means that the FK091 is AGM
The FK091 is AGM: the electrolyte is absorbed in glass fibre mats, so it is sealed and spill-proof. Being sealed, the FK091 can be fitted in the boot or under a seat with no risk of spills.
What to look at before buying the FK091
- Measure the space: the FK091 takes up 150 × 90 × 105 mm.
- Polarity of the FK091: positive terminal on the left (if yours has it on the other side, the cables will not reach).
- Capacity of the FK091: 9 Ah; the same as your current battery or slightly more is fine.
- The FK091 delivers 120 A cold cranking (EN standard); do not go below what your original battery states.
Part numbers and codes for the Fulmen FK091
Look for any of these FK091 codes on your current battery or in the manufacturer's catalogue:
| Commercial reference | FK091 |
|---|---|
| EAN | 3661024046336 |
| Terminal type | M12 |
Frequently asked questions about the Fulmen FK091
FK091 or FK111: which one suits me?
Compared with the FK091, the Fulmen FK111 has 2 Ah more and 30 A more cranking power. If your current battery says 150 A or more, choose the FK111; if it says 120 A or less, the FK091 is enough. Mind the space: the FK111 measures 150 × 90 × 130 mm.
How much does the Fulmen FK091 weigh?
3.1 kg, with 9 Ah of capacity. For reference, the Fulmen FK111 (11 Ah) weighs 3.9 kg.
Which battery is equivalent to the Fulmen FK091?
Only other AGM batteries with its dimensions and polarity: Exide EK091, Tudor TK091 and Deta DK091. Neither an EFB nor a conventional battery replaces the FK091.
Which side is the positive terminal on the Fulmen FK091?
On the FK091, the positive terminal is on the left with the terminals facing you: compare it with your current battery, because with reversed polarity the cables will not reach.
Keep comparing: alternatives to the FK091
- More auxiliary batteries (back-up and in-vehicle service)
- Full Fulmen catalogue
- Exide EK091 · 9 Ah, 120 A, 150×90×105 mm
- Tudor TK091 · 9 Ah, 120 A, 150×90×105 mm
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