Hey my battery is dead and I was gonna replace it
is it possible to give me some suggestion?

 

I notice that you are in Poland, and I am unsure which brands are available over there. While there are hundreds of battery brand names the world over, there are only about five or six companies who make the vast majority of them. BMW uses several of these companies as OE sources for their batteries.

You need to do some research by gathering the specifications of the battery you are replacing (CCA, RC and CA) including the battery type and dimensions. A white top battery is a flooded lead acid type and a black top is an absorbed glass mat type. I recommend you purchase the same type as you had. The replacement battery should have a venting port in the same position as your existing one.

Handle the battery cables gently while swapping out the battery.