Between 50 and 150 Euro. I paid 75 Euro's.

I'm wondering why you aren't allowed to return it. Do they explicitly mention a non-return policy for car batteries anywhere? Is this a universal policy for car batteries even at the stationary car battery store next door? Or what do you even mean with security condition?

"Aus Sicherheitsgründen können Artikel, die entzündliche Flüssigkeiten oder Gase enthalten, nicht an Amazon zurückgesendet werden. Bitte kontaktieren Sie uns, um weitere Informationen oder Unterstützung zu erhalten."

 

In the case of a warranty claim, i probably had to bring the battery to a dealer.