my stock battery just went cuput. I read alot about cold cranking amps, cranking amps , optima red and blue and yellow. I decided on the biggest cranking amp energizer . reason : 1100 cranking and 900 cold cranking . 80 bucks compared to 150 for optima . None of the pep boys or auto zone had them in stock. Now the windows roll up quicker , it cranks fast. and the 550 watts of amps in the back can play longer than 20 min. on the old stock battery. I could almos replace it two times for the price of the optima. have to see how long it lasts. fit right in the same spot no prob. it has side monts for the amps to have a good connection.