will a normall battery fit in our beetles or do i need a special battery. mine wont keep a charge anymore so i need a new one. also will i be able to use moonsoon dash speakers in my car since i dotn got them. im talking about the ones on the top dash. and can i just use monsoon speakers troughout my car. im wondering bc my front door speakers stopped playing all together. i think i have a bad connection in them but i rather just replace them all.