Summary: Drivers and owners of start-stop vehicles know this one as the Fulmen FL550. Nominal voltage is 12V, the same as most equipment of this kind.
Fulmen FL550 for start-stop vehicles
Rated 55Ah 12V 540A, the Fulmen FL550 answers the needs of start-stop vehicles. The case measures 207 × 175 × 190 mm, and stop-start trays rarely leave room for anything bigger. Batteries online for stop-start cars are easiest to choose by exact code.
55Ah keeps the battery small, handy for tight trays.
12VVoltage
55AhCapacity, 20-hour rate (C20)
540AStarting power (EN)
Make sure it fits your vehicle or equipment
- ✓ A different chemistry from EFB may need system changes.
- ✓ Grab a tape measure: 207 × 175 × 190 mm is what this case needs.
- ✓ Plus post: positive on the right-hand side. Check yours before ordering.
Measurements, ratings and codes
Your questions answered
Is the Fulmen FL550 the same size and layout as my battery?
Size is 207 × 175 × 190 mm and polarity positive on the right-hand side. Both must match your current battery.
Can a battery be stored before use?
It is a good idea. All batteries lose some charge on the shelf, so a top-up before fitting helps.
How large and heavy is this battery?
At 207 × 175 × 190 mm and 14.1 kg, it needs a tray of that size and a careful lift.
What do 55Ah and 540A mean for this battery?
The cranking figure is 540A, measured to the EN standard, and the capacity is 55Ah. If your engine is large or you live somewhere cold, choose the higher end of what your vehicle allows.
EFB: how it works
Thicker grids give an EFB more resistance to wear. EFB is often the more affordable step up from a standard battery for a stop-start car. Keep terminals clean and the hold-down tight.
Other options with identical dimensions
Looking to compare? Each of these has the dimensions and polarity of the Fulmen FL550.
Exide EL550Tudor TL550Varta A9Varta N50
More options
Ordering online at baterias.online is the quick part once the checks are done. Checking the terminal side takes ten seconds and saves a lot of bother.
Practical advice for start-stop vehicles
Dashcams with parking mode quietly drain the battery of start-stop vehicles overnight. After fitting, many makes need the new battery coded through the OBD port so the alternator charges it correctly. A swollen case on any eco-stop battery means immediate replacement.
